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Circulation. 2000;102:1082-1085

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(Circulation. 2000;102:1082.)
© 2000 American Heart Association, Inc.


Clinical Investigation and Reports

Lipoprotein(a) and Coronary Heart Disease

Meta-Analysis of Prospective Studies

John Danesh, MBChB, MSc, DPhil; Rory Collins, MBBS, MSc; Richard Peto, FRS

From the Clinical Trial Service Unit and Epidemiological Studies Unit, Nuffield Department of Clinical Medicine, University of Oxford, Radcliffe Infirmary, Oxford, UK.

Correspondence to Dr John Danesh, CTSU, Radcliffe Infirmary, Oxford OX2 6HE, UK.


*    Abstract
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Background—Studies of the association between the plasma concentration of lipoprotein(a) [Lp(a)] and coronary heart disease (CHD) have reported apparently conflicting findings. We report a meta-analysis of the prospective studies with at least 1 year of follow-up published before 2000.

Methods and Results—The following information was abstracted for each study: geographical location of study, size, type of cohort (population-based or selected because of previous disease), mean age, follow-up duration, blood storage temperature and duration, assay methods, degree of adjustment for potential confounders, and relationship of baseline Lp(a) measurement with subsequent CHD risk. There were 5436 deaths from CHD or nonfatal myocardial infarctions during a weighted mean follow-up of 10 years in the 27 eligible studies. Comparison of individuals in the top third of baseline plasma Lp(a) measurements with those in the bottom third in each study yielded a combined risk ratio of 1.6 (95% CI 1.4 to 1.8, 2P<0.00001), with similar findings when the analyses were restricted to the 18 studies of general populations (combined risk ratio 1.7, 95% CI 1.4 to 1.9; 2P<0.00001). Despite differences among studies in blood storage techniques and assay methods, there was no significant heterogeneity among the results from the 18 population-based studies or among those from the 9 studies of patients with previous disease. Lp(a) was only weakly correlated with classical vascular risk factors, and adjustment for those that had been recorded made little difference to the reported risk ratios.

Conclusions—These prospective studies demonstrate a clear association between Lp(a) and CHD, but further studies are needed to determine the extent to which this is causal.


Key Words: lipoproteins • coronary disease • meta-analysis


*    Introduction
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Epidemiological studies of coronary heart disease (CHD) and blood concentrations of lipoprotein(a) [Lp(a)], a large protein attached to an LDL particle (TableDown), have yielded apparently conflicting results, ranging from a strongly positive association to no association at all.1 2 3 A previous meta-analysis4 involved {approx}1600 CHD cases in 12 prospective studies, but since the publication of that review, the evidence has increased to >5400 cases of CHD death or nonfatal myocardial infarction in 27 prospective studies. This article provides an updated meta-analysis of the published studies in which CHD events were recorded for some years after "baseline" blood collection. Such prospective studies should be less prone to bias than retrospective studies because they limit any influence of preexisting disease itself on blood concentrations of Lp(a).


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Table 1. Characteristics of Lp(a)


*    Methods
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Search Methods and Data Abstraction
Prospective studies with at least 1 year of follow-up that reported before 2000 on correlations between blood concentrations of Lp(a) and CHD death or nonfatal myocardial infarction were sought by Medline (http://igm.nlm.nih.gov) searches; by scanning relevant reference lists; by hand searching cardiology, epidemiology, and other relevant journals; and by discussion and correspondence with authors of relevant reports.5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Computer searches used combinations of key words relating to disease (CHD, myocardial infarction, atherosclerosis, and vascular disease) and Lp(a). Articles in languages other than English were to be translated. The following information was abstracted according to a fixed protocol (with discussion and checks to resolve any discrepancies): geographical location of study, size, type of cohort (population-based or selected because of previous disease), mean age, follow-up duration, blood storage temperature and duration, assay methods, and degree of adjustment for potential confounders.

Studies Identified
Twenty-seven published prospective studies involving a total of 5436 CHD cases were identified, of which 9 involved patients with preexisting CHD,23 26 27 28 30 31 diabetes,29 or renal disease.24 25 The studies were conducted in Nordic countries,9 12 15 17 18 20 22 23 28 31 Germany,14 19 the United Kingdom,8 21 27 30 the United States,5 6 7 10 11 13 24 26 29 Canada,16 and Japan25 ; most involved only white participants, and 4 were "nested" within randomized trials.6 7 12 23 The weighted mean age at the time of the CHD event was 61 years, which represented a weighted mean age at baseline of 51 years and a weighted mean follow-up of 10 years. A few studies made measurements in fresh samples,5 10 13 19 22 31 but most stored the blood for some years at low temperatures (range -20°C to -90°C) before thawing and analyzing samples from those who had subsequently suffered a CHD event and from age- and sex-matched controls for nested case-control comparisons. Different studies used different methods to measure Lp(a) concentrations, including electrophoresis,5 10 13 22 ELISA,6 7 8 11 12 14 16 17 20 25 26 27 28 29 30 radioimmunoassay,9 21 23 24 electroimmunodiffusion,19 electroimmunoassay,31 and immunoradiometric assay.15 18 Most studies made adjustments for smoking, blood lipid concentrations, and other classical vascular risk factors, such as blood pressure (see FigureDown legend).



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Figure 1. Prospective studies5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 of Lp(a) and CHD. Risk ratios compare top and bottom thirds of baseline measurements. Black squares indicate risk ratio in each study, with square size proportional to number of cases and horizontal lines representing 99% CIs. The combined risk ratios and their 95% CI are indicated by shaded diamonds. Degree of adjustment for possible confounders is denoted as follows: +, adjustment for age and sex only; ++, adjustment for the preceding plus smoking; and +++, adjustment for the preceding plus some other classical vascular risk factors.

Statistical Methods
The present meta-analysis is based only on within-study comparisons, thereby avoiding any biases being caused by methodological differences between studies. Plasma concentrations of Lp(a) had been measured by various assay methods, with different studies reporting risk ratios on the basis of different cutoff levels (including comparisons of mean values, thirds, quarters, fifths, etc) or as increases in risk for a given increase in Lp(a). The risk ratios derived for the present review compare individuals in the top third of single baseline measurements versus those in the bottom third; see previous publication for statistical details.32 Studies based on the interpretation of electrophoretic bands5 10 13 22 involved only a few Lp(a) categories. For the present meta-analysis, the highest was taken to correspond with the top third of baseline values; the lowest, with the bottom third. The standard error of the log risk ratio in each study was estimated from the number of standard errors by which the reported relationship differed from zero.32 Summary estimates of the risk ratios from all studies were obtained by combining the separate estimates of inverse-variance–weighted log risk ratios from each study. This is valid even though different studies used different assay methods, because cases were compared directly only with controls within the same studies. CIs were obtained by normal approximations to the log relative risk, with 99% CIs used for the individual study results to take account of the increased scope for the play of chance in multiple comparisons and 95% CIs used for the overall results. Heterogeneity was assessed by standard {chi}2 tests.


*    Results
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The FigureUp displays the results for each separate study, with separate subtotals for studies in general populations and in patients with preexisting disease. Overall, in the 18 population-based cohorts, the combined risk ratio for the comparison of CHD rates in the top third of baseline Lp(a) measurement versus those in the bottom third was 1.7 (95% CI 1.4 to 1.9, 2P<0.00001). There was no significant heterogeneity between the risk ratios in these 18 studies ({chi}217=19.6, P>0.1). One of those 18 studies5 accounts for almost half the cases, but the risk ratio of 1.66 (95% CI 1.41 to 1.95) in that study is almost identical to the risk ratio of 1.69 (95% CI 1.45 to 1.96) in the aggregated results of the others, and in none of the 17 smaller studies was the risk ratio significantly different from the overall result. The risk ratios were also similar when population-based studies were grouped by various characteristics, including studies that made measurements in fresh samples versus those that froze and thawed samples before measurement (1.72 versus 1.59, {chi}21=0.4; P>0.1), those that stored samples for <5 years versus that stored samples for >=5 years (1.58 versus 1.59, {chi}21=0.3; P>0.1), or those that used ELISAs versus those that used other assay methods (1.65 versus 1.67, {chi}21=0.0; P>0.1).

Overall, in the 9 studies of patients who already had some disease at baseline, the combined risk ratio was 1.3 (95% CI 1.1 to 1.6, 2P<0.001), which is significantly smaller than that for the population-based studies ({chi}21=3.8, P=0.05). This result for studies in patients with preexisting disease is dominated by just one large study of patients with a history of myocardial infarction,23 which accounted for three fourths of the evidence. The other 8 studies were all small; hence, although their results are all statistically compatible with a relative risk of 1.3 (and there was no significant heterogeneity among the 9 studies; {chi}28=9.7, P>0.1), they add little information to the one large study in patients with preexisting disease.

The published reports of these 27 studies contained insufficient information to produce combined analyses within subgroups defined by other potentially relevant characteristics (eg, age, sex, and fatal versus nonfatal CHD).


*    Discussion
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*Discussion
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This meta-analysis of 27 prospective studies with information on 5436 CHD cases observed during mean follow-up of 10 years provides the most reliable assessment so far of the association between plasma Lp(a) and CHD. It indicates that people in the general population with Lp(a) levels in the top third of baseline measurement are at {approx}70% increased risk of CHD compared with those in the bottom third. The risk ratio appeared to be less extreme in the 9 studies of patients with preexisting disease, but those studies may be less directly relevant than the population-based studies in the assessment of cause-and-effect relationships. Concentrations of plasma Lp(a) and classical vascular risk factors have not been found to be strongly correlated (TableUp), and these prospective studies of CHD generally reported little or no change in risk ratios after adjustment for other risk factors. This suggests that any effects of Lp(a) are unlikely to be accounted for by effects on, or confounding with, classical vascular risk factors.

In the present meta-analysis, cases were compared directly only with controls within the same studies, thereby avoiding any bias due to the use of different assay methods, reagents, and blood storage conditions among the different studies. There was no evidence of significant heterogeneity of the CHD risk ratios among the 18 population-based cohorts (or among the 9 cohorts defined on the basis of previous disease). However, several potential limitations of the present meta-analysis warrant attention. First, assays for Lp(a) are now widely available, so other prospective studies of Lp(a) and CHD that have not yet been reported may well exist. But, any exaggeration of the CHD risk ratio due to the preferential publication of reports with more extreme associations is unlikely to be substantial, particularly because the combined risk ratio for the 17 smaller population-based studies was so similar to that for the single largest study.5 Second, certain chronic conditions (such as inflammatory diseases) might both alter Lp(a) concentrations and be associated with CHD, but this would be expected to have only a small effect on the association of Lp(a) with CHD. Moreover, attempts in certain studies to control for the possible effects of preexisting disease on Lp(a) by the exclusion of those known to have certain conditions or by omission of any CHD events during the first few years of follow-up did not appear to change the reported associations substantially. Conversely, it is possible that the published studies have somewhat underestimated the role of Lp(a) in CHD. Only slight underestimation is likely to be due to the lack of correction in most studies for regression dilution,33 because within-individual fluctuations of measured Lp(a) concentrations over time are relatively small (self-correlation {approx}0.9, TableUp). However, more substantial underestimation is possible if Lp(a) variants in people with higher blood concentrations were selectively degraded in studies with suboptimal blood storage conditions.34 Moreover, there are great differences between individuals in the nature of Lp(a), with different isoforms of the protein differing widely in molecular weight (TableUp) and, hence, perhaps also in biological activity. Some studies have suggested stronger associations between CHD and certain apolipoprotein(a) isoforms than with others,35 36 37 but this question has not yet been studied with appropriately large numbers.

More detailed combined analysis of the prospective studies of Lp(a), perhaps with the use of individual participant data from each study, could help to characterize the shapes of any dose-response relationship, reduce any bias related to the selection of particular cutoff levels, allow more complete adjustment for other risk factors, and assess associations in particular subgroups. If practicable treatments become available that substantially lower Lp(a),38 then randomized trials might eventually become relevant to assessing the causal nature of this association (and, hence, the potential for reducing CHD risk). Studies of CHD and genetic polymorphisms that are associated with Lp(a) concentrations may also help to elucidate causality. Thus, much further study is still needed to determine the relevance of Lp(a) in the causation of CHD, but at least the existence of a moderately strong association of Lp(a) with CHD, independent of the standard vascular risk factors, is now clearly established.


*    Acknowledgments
 
Dr Danesh was supported by a Merton College fellowship and a Frohlich award, and Dr Collins holds a British Heart Foundation personal chair. M.J. Meyer assisted with data abstraction. P. Appleby plotted the figure. The following investigators kindly provided additional information for their studies: Gosta Dahlen,17 Peter Cremer,14 Ronald Klein,29 Santica Marcovina,11 Dorothea Nagel,14 Tu Nguyen,5 and Nicholas Wald.8

Received November 22, 1999; revision received March 21, 2000; accepted March 29, 2000.


*    References
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up arrowResults
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*References
 
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S. H. Choi, A. Chae, E. Miller, M. Messig, F. Ntanios, A. N. DeMaria, S. E. Nissen, J. L. Witztum, and S. Tsimikas
Relationship Between Biomarkers of Oxidized Low-Density Lipoprotein, Statin Therapy, Quantitative Coronary Angiography, and Atheroma Volume Observations From the REVERSAL (Reversal of Atherosclerosis with Aggressive Lipid Lowering) Study.
J. Am. Coll. Cardiol., July 1, 2008; 52(1): 24 - 32.
[Abstract] [Full Text] [PDF]


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CJASNHome page
Y. P. Liew, J. R. Bartholomew, S. Demirjian, J. Michaels, and M. J. Schreiber Jr.
Combined Effect of Chronic Kidney Disease and Peripheral Arterial Disease on All-Cause Mortality in a High-Risk Population
Clin. J. Am. Soc. Nephrol., July 1, 2008; 3(4): 1084 - 1089.
[Abstract] [Full Text] [PDF]


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Nephrol Dial TransplantHome page
J. Staples, P. Taylor, A. Magil, J. Frohlich, S. M. Johnston, M. Koschinsky, C. Chan-Yan, and A. Levin
Progressive kidney disease in three sisters with elevated lipoprotein(a)
Nephrol. Dial. Transplant., May 1, 2008; 23(5): 1756 - 1759.
[Full Text] [PDF]


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J. Clin. Endocrinol. Metab.Home page
E. Anuurad, J. Rubin, A. Chiem, R. P. Tracy, T. A. Pearson, and L. Berglund
High Levels of Inflammatory Biomarkers Are Associated with Increased Allele-Specific Apolipoprotein(a) Levels in African-Americans
J. Clin. Endocrinol. Metab., April 1, 2008; 93(4): 1482 - 1488.
[Abstract] [Full Text] [PDF]


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Arch Intern MedHome page
A. Bennet, E. Di Angelantonio, S. Erqou, G. Eiriksdottir, G. Sigurdsson, M. Woodward, A. Rumley, G. D. O. Lowe, J. Danesh, and V. Gudnason
Lipoprotein(a) Levels and Risk of Future Coronary Heart Disease: Large-Scale Prospective Data
Arch Intern Med, March 24, 2008; 168(6): 598 - 608.
[Abstract] [Full Text] [PDF]


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Endocr. Rev.Home page
B. Biondi and D. S. Cooper
The Clinical Significance of Subclinical Thyroid Dysfunction
Endocr. Rev., February 1, 2008; 29(1): 76 - 131.
[Abstract] [Full Text] [PDF]


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Clin. Chem.Home page
K.-L. Chien, H.-C. Hsu, T.-C. Su, F.-C. Sung, M.-F. Chen, and Y.-T. Lee
Lipoprotein(a) and Cardiovascular Disease in Ethnic Chinese: The Chin-Shan Community Cardiovascular Cohort Study
Clin. Chem., February 1, 2008; 54(2): 285 - 291.
[Abstract] [Full Text] [PDF]


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CirculationHome page
P. R. Kamstrup, M. Benn, A. Tybjaerg-Hansen, and B. G. Nordestgaard
Extreme Lipoprotein(a) Levels and Risk of Myocardial Infarction in the General Population: The Copenhagen City Heart Study
Circulation, January 15, 2008; 117(2): 176 - 184.
[Abstract] [Full Text] [PDF]


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JNMHome page
L. G. Spagnoli, E. Bonanno, G. Sangiorgi, and A. Mauriello
Role of Inflammation in Atherosclerosis
J. Nucl. Med., November 1, 2007; 48(11): 1800 - 1815.
[Abstract] [Full Text] [PDF]


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Eur Heart JHome page
Authors/Task Force Members, I. Graham, D. Atar, K. Borch-Johnsen, G. Boysen, G. Burell, R. Cifkova, J. Dallongeville, G. De Backer, S. Ebrahim, et al.
European guidelines on cardiovascular disease prevention in clinical practice: executive summary: Fourth Joint Task Force of the European Society of Cardiology and Other Societies on Cardiovascular Disease Prevention in Clinical Practice (Constituted by representatives of nine societies and by invited experts)
Eur. Heart J., October 1, 2007; 28(19): 2375 - 2414.
[Full Text] [PDF]


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Arterioscler. Thromb. Vasc. Bio.Home page
S. Tsimikas, L. D. Tsironis, and A. D. Tselepis
New Insights Into the Role of Lipoprotein(a)-Associated Lipoprotein-Associated Phospholipase A2 in Atherosclerosis and Cardiovascular Disease
Arterioscler Thromb Vasc Biol, October 1, 2007; 27(10): 2094 - 2099.
[Abstract] [Full Text] [PDF]


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Arterioscler. Thromb. Vasc. Bio.Home page
M. M. Luke, J. P. Kane, D. M. Liu, C. M. Rowland, D. Shiffman, J. Cassano, J. J. Catanese, C. R. Pullinger, D. U. Leong, A. R. Arellano, et al.
A Polymorphism in the Protease-Like Domain of Apolipoprotein(a) Is Associated With Severe Coronary Artery Disease
Arterioscler Thromb Vasc Biol, September 1, 2007; 27(9): 2030 - 2036.
[Abstract] [Full Text] [PDF]


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Arterioscler. Thromb. Vasc. Bio.Home page
S. Kiechl, J. Willeit, M. Mayr, B. Viehweider, M. Oberhollenzer, F. Kronenberg, C. J. Wiedermann, S. Oberthaler, Q. Xu, J. L. Witztum, et al.
Oxidized Phospholipids, Lipoprotein(a), Lipoprotein-Associated Phospholipase A2 Activity, and 10-Year Cardiovascular Outcomes: Prospective Results From the Bruneck Study
Arterioscler Thromb Vasc Biol, August 1, 2007; 27(8): 1788 - 1795.
[Abstract] [Full Text] [PDF]


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Clin. Chem.Home page
B. Dieplinger, A. Lingenhel, N. Baumgartner, W. Poelz, H. Dieplinger, M. Haltmayer, F. Kronenberg, and T. Mueller
Increased Serum Lipoprotein(a) Concentrations and Low Molecular Weight Phenotypes of Apolipoprotein(a) Are Associated with Symptomatic Peripheral Arterial Disease
Clin. Chem., July 1, 2007; 53(7): 1298 - 1305.
[Abstract] [Full Text] [PDF]


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Am. J. Clin. Nutr.Home page
M.-P. St-Onge, I. Aban, A. Bosarge, B. Gower, K. D Hecker, and D. B Allison
Snack chips fried in corn oil alleviate cardiovascular disease risk factors when substituted for low-fat or high-fat snacks
Am. J. Clinical Nutrition, June 1, 2007; 85(6): 1503 - 1510.
[Abstract] [Full Text] [PDF]


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StrokeHome page
B. Smolders, R. Lemmens, and V. Thijs
Lipoprotein (a) and Stroke: A Meta-Analysis of Observational Studies
Stroke, June 1, 2007; 38(6): 1959 - 1966.
[Abstract] [Full Text] [PDF]


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CirculationHome page
I. Tzoulaki, G. D. Murray, A. J. Lee, A. Rumley, G. D.O. Lowe, and F. G. R. Fowkes
Relative Value of Inflammatory, Hemostatic, and Rheological Factors for Incident Myocardial Infarction and Stroke: The Edinburgh Artery Study
Circulation, April 24, 2007; 115(16): 2119 - 2127.
[Abstract] [Full Text] [PDF]


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Clin. Chem.Home page
G. T. Jones, A. M. van Rij, J. Cole, M. J.A. Williams, E. H. Bateman, S. M. Marcovina, M. Deng, and S. P.A. McCormick
Plasma Lipoprotein(a) Indicates Risk for 4 Distinct Forms of Vascular Disease
Clin. Chem., April 1, 2007; 53(4): 679 - 685.
[Abstract] [Full Text] [PDF]


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JAMAHome page
P. M Ridker, J. E. Buring, N. Rifai, and N. R. Cook
Development and Validation of Improved Algorithms for the Assessment of Global Cardiovascular Risk in Women: The Reynolds Risk Score
JAMA, February 14, 2007; 297(6): 611 - 619.
[Abstract] [Full Text] [PDF]


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Vasc MedHome page
G. V Bedarida, U. Hoffmann, and F. Tato
Acute lower limb ischemia due to thrombo-embolic arterial occlusions in two previously healthy men with markedly elevated Lp(a)
Vascular Medicine, November 1, 2006; 11(4): 259 - 262.
[Abstract] [PDF]


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JAMAHome page
J. Suk Danik, N. Rifai, J. E. Buring, and P. M Ridker
Lipoprotein(a), measured with an assay independent of apolipoprotein(a) isoform size, and risk of future cardiovascular events among initially healthy women.
JAMA, September 20, 2006; 296(11): 1363 - 1370.
[Abstract] [Full Text] [PDF]


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Eur J EndocrinolHome page
M. Hero, C. Ankarberg-Lindgren, M.-R. Taskinen, and L. Dunkel
Blockade of oestrogen biosynthesis in peripubertal boys: effects on lipid metabolism, insulin sensitivity, and body composition
Eur. J. Endocrinol., September 1, 2006; 155(3): 453 - 460.
[Abstract] [Full Text] [PDF]


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Int J EpidemiolHome page
B. Keavney, J. Danesh, S. Parish, A. Palmer, S. Clark, L. Youngman, M. Delepine, M. Lathrop, R. Peto, R. Collins, et al.
Fibrinogen and coronary heart disease: test of causality by 'Mendelian randomization'
Int. J. Epidemiol., August 1, 2006; 35(4): 935 - 943.
[Abstract] [Full Text] [PDF]


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JAMAHome page
M. A. Mittleman
A 39-year-old woman with hypercholesterolemia.
JAMA, July 19, 2006; 296(3): 319 - 326.
[Abstract] [Full Text] [PDF]


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Diabetes CareHome page
B. Kollerits, M. Auinger, V. Reisig, T. Kastenbauer, A. Lingenhel, K. Irsigler, R. Prager, and F. Kronenberg
Lipoprotein(a) as a Predictor of Cardiovascular Disease in a Prospectively Followed Cohort of Patients With Type 1 Diabetes
Diabetes Care, July 1, 2006; 29(7): 1661 - 1663.
[Full Text] [PDF]


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CirculationHome page
L. B. Goldstein, R. Adams, M. J. Alberts, L. J. Appel, L. M. Brass, C. D. Bushnell, A. Culebras, T. J. DeGraba, P. B. Gorelick, J. R. Guyton, et al.
Primary Prevention of Ischemic Stroke: A Guideline From the American Heart Association/American Stroke Association Stroke Council: Cosponsored by the Atherosclerotic Peripheral Vascular Disease Interdisciplinary Working Group; Cardiovascular Nursing Council; Clinical Cardiology Council; Nutrition, Physical Activity, and Metabolism Council; and the Quality of Care and Outcomes Research Interdisciplinary Working Group: The American Academy of Neurology affirms the value of this guideline.
Circulation, June 20, 2006; 113(24): e873 - e923.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
S. Tsimikas, S. Kiechl, J. Willeit, M. Mayr, E. R. Miller, F. Kronenberg, Q. Xu, C. Bergmark, S. Weger, F. Oberhollenzer, et al.
Oxidized Phospholipids Predict the Presence and Progression of Carotid and Femoral Atherosclerosis and Symptomatic Cardiovascular Disease: Five-Year Prospective Results From the Bruneck Study
J. Am. Coll. Cardiol., June 6, 2006; 47(11): 2219 - 2228.
[Abstract] [Full Text] [PDF]


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StrokeHome page
J. D. Spence
Lipoprotein(a): Involved in Events, but Not Burden of Atherosclerotic Disease?
Stroke, June 1, 2006; 37(6): 1350 - 1351.
[Full Text] [PDF]


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StrokeHome page
L. B. Goldstein, R. Adams, M. J. Alberts, L. J. Appel, L. M. Brass, C. D. Bushnell, A. Culebras, T. J. DeGraba, P. B. Gorelick, J. R. Guyton, et al.
Primary Prevention of Ischemic Stroke: A Guideline From the American Heart Association/American Stroke Association Stroke Council: Cosponsored by the Atherosclerotic Peripheral Vascular Disease Interdisciplinary Working Group; Cardiovascular Nursing Council; Clinical Cardiology Council; Nutrition, Physical Activity, and Metabolism Council; and the Quality of Care and Outcomes Research Interdisciplinary Working Group: The American Academy of Neurology affirms the value of this guideline.
Stroke, June 1, 2006; 37(6): 1583 - 1633.
[Abstract] [Full Text] [PDF]


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CirculationHome page
R. S. Vasan
Biomarkers of Cardiovascular Disease: Molecular Basis and Practical Considerations
Circulation, May 16, 2006; 113(19): 2335 - 2362.
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J. Lipid Res.Home page
J. Rubin, H. J. Kim, T. A. Pearson, S. Holleran, R. Ramakrishnan, and L. Berglund
Apo[a] size and PNR explain African American-Caucasian differences in allele-specific apo[a] levels for small but not large apo[a]
J. Lipid Res., May 1, 2006; 47(5): 982 - 989.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
S. Tsimikas, J. T. Willerson, and P. M. Ridker
C-reactive protein and other emerging blood biomarkers to optimize risk stratification of vulnerable patients.
J. Am. Coll. Cardiol., April 18, 2006; 47(8 Suppl): C19 - C31.
[Abstract] [Full Text] [PDF]


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J. Nutr.Home page
S. S. AbuMweis, C. A. Vanstone, N. Ebine, A. Kassis, L. M. Ausman, P. J. H. Jones, and A. H. Lichtenstein
Intake of a Single Morning Dose of Standard and Novel Plant Sterol Preparations for 4 Weeks Does Not Dramatically Affect Plasma Lipid Concentrations in Humans
J. Nutr., April 1, 2006; 136(4): 1012 - 1016.
[Abstract] [Full Text] [PDF]


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CirculationHome page
T. Pischon, C. J. Girman, F. M. Sacks, N. Rifai, M. J. Stampfer, and E. B. Rimm
Non-High-Density Lipoprotein Cholesterol and Apolipoprotein B in the Prediction of Coronary Heart Disease in Men
Circulation, November 29, 2005; 112(22): 3375 - 3383.
[Abstract] [Full Text] [PDF]


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Clin. Chem.Home page
D. T. Holmes, B. A. Schick, K. H. Humphries, and J. Frohlich
Lipoprotein(a) Is an Independent Risk Factor for Cardiovascular Disease in Heterozygous Familial Hypercholesterolemia
Clin. Chem., November 1, 2005; 51(11): 2067 - 2073.
[Abstract] [Full Text] [PDF]


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British Journal of Diabetes & Vascular DiseaseHome page
B. Mukhopadhyay, N. Sattar, and M. Fisher
Review: Diabetes and cardiac disease in South Asians
The British Journal of Diabetes & Vascular Disease, September 1, 2005; 5(5): 253 - 259.
[Abstract] [PDF]


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Diabetes CareHome page
Z. T. Bloomgarden
Inflammation, Atherosclerosis, and Aspects of Insulin Action
Diabetes Care, September 1, 2005; 28(9): 2312 - 2319.
[Full Text] [PDF]


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Eur Heart JHome page
I. Shai, E. B. Rimm, S. E. Hankinson, C. Cannuscio, G. Curhan, J. E. Manson, N. Rifai, M. J. Stampfer, and J. Ma
Lipoprotein (a) and coronary heart disease among women: beyond a cholesterol carrier?
Eur. Heart J., August 2, 2005; 26(16): 1633 - 1639.
[Abstract] [Full Text] [PDF]


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NEJMHome page
S. Tsimikas, E. S. Brilakis, E. R. Miller, J. P. McConnell, R. J. Lennon, K. S. Kornman, J. L. Witztum, and P. B. Berger
Oxidized Phospholipids, Lp(a) Lipoprotein, and Coronary Artery Disease
N. Engl. J. Med., July 7, 2005; 353(1): 46 - 57.
[Abstract] [Full Text] [PDF]


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Arterioscler. Thromb. Vasc. Bio.Home page
M. Y. Desai, A. Rodriguez, B. A. Wasserman, G. Gerstenblith, S. Agarwal, M. Kennedy, D. A Bluemke, and J. A.C. Lima
Association of Cholesterol Subfractions and Carotid Lipid Core Measured by MRI
Arterioscler Thromb Vasc Biol, June 1, 2005; 25(6): e110 - e111.
[Full Text] [PDF]


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J. Am. Soc. Nephrol.Home page
J. C. Longenecker, M. J. Klag, S. M. Marcovina, Y.-M. Liu, B. G. Jaar, N. R. Powe, N. E. Fink, A. S. Levey, and J. Coresh
High Lipoprotein(a) Levels and Small Apolipoprotein(a) Size Prospectively Predict Cardiovascular Events in Dialysis Patients
J. Am. Soc. Nephrol., June 1, 2005; 16(6): 1794 - 1802.
[Abstract] [Full Text] [PDF]


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ANN INTERN MEDHome page
W. S. Tzou, P. S. Douglas, S. R. Srinivasan, W. Chen, G. Berenson, and J. H. Stein
Advanced Lipoprotein Testing Does Not Improve Identification of Subclinical Atherosclerosis in Young Adults: The Bogalusa Heart Study
Ann Intern Med, May 3, 2005; 142(9): 742 - 750.
[Abstract] [Full Text] [PDF]


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Diabetes CareHome page
C. Hernandez, G. Francisco, P. Chacon, and R. Simo
Lipoprotein(a) as a Risk Factor for Cardiovascular Mortality in Type 2 Diabetic Patients: A 10-year follow-up study
Diabetes Care, April 1, 2005; 28(4): 931 - 933.
[Full Text] [PDF]


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CirculationHome page
R. Guerra, Z. Yu, S. Marcovina, R. Peshock, J. C. Cohen, and H. H. Hobbs
Lipoprotein(a) and Apolipoprotein(a) Isoforms: No Association With Coronary Artery Calcification in The Dallas Heart Study
Circulation, March 29, 2005; 111(12): 1471 - 1479.
[Abstract] [Full Text] [PDF]


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Nephrol Dial TransplantHome page
E. M. Stuveling, S. J. L. Bakker, H. L. Hillege, P. E. de Jong, R. O. B. Gans, and D. de Zeeuw
Biochemical risk markers: a novel area for better prediction of renal risk?
Nephrol. Dial. Transplant., March 1, 2005; 20(3): 497 - 508.
[Full Text] [PDF]


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Mayo Clin Proc.Home page
I. J. Kullo and C. M. Ballantyne
Conditional Risk Factors for Atherosclerosis
Mayo Clin. Proc., February 1, 2005; 80(2): 219 - 230.
[Abstract] [PDF]


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HeartHome page
H A W Neil, V Seagroatt, D J Betteridge, M P Cooper, P N Durrington, J P Miller, M Seed, R P Naoumova, G R Thompson, R Huxley, et al.
Established and emerging coronary risk factors in patients with heterozygous familial hypercholesterolaemia
Heart, December 1, 2004; 90(12): 1431 - 1437.
[Abstract] [Full Text] [PDF]


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Arterioscler. Thromb. Vasc. Bio.Home page
L. Berglund and R. Ramakrishnan
Lipoprotein(a): An Elusive Cardiovascular Risk Factor
Arterioscler Thromb Vasc Biol, December 1, 2004; 24(12): 2219 - 2226.
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Mayo Clin Proc.Home page
I. J. Kullo, K. R. Bailey, L. F. Bielak, P. F. Sheedy II, G. G. Klee, S. L. Kardia, P. A. Peyser, E. Boerwinkle, and S. T. Turner
Lack of Association Between Lipoprotein(a) and Coronary Artery Calcification in the Genetic Epidemiology Network of Arteriopathy (GENOA) Study
Mayo Clin. Proc., October 1, 2004; 79(10): 1258 - 1263.
[Abstract] [PDF]


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Am. J. Clin. Nutr.Home page
K. Hoffmann, B.-C. Zyriax, H. Boeing, and E. Windler
A dietary pattern derived to explain biomarker variation is strongly associated with the risk of coronary artery disease
Am. J. Clinical Nutrition, September 1, 2004; 80(3): 633 - 640.
[Abstract] [Full Text] [PDF]


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Clin. Chem.Home page
N. Rifai, J. Ma, F. M. Sacks, P. M. Ridker, W. J. L. Hernandez, M. J. Stampfer, and S. M. Marcovina
Apolipoprotein(a) Size and Lipoprotein(a) Concentration and Future Risk of Angina Pectoris with Evidence of Severe Coronary Atherosclerosis in Men: The Physicians' Health Study
Clin. Chem., August 1, 2004; 50(8): 1364 - 1371.
[Abstract] [Full Text] [PDF]


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Cardiovasc ResHome page
L. D Tsironis, J. V Mitsios, H. J Milionis, M. Elisaf, and A. D Tselepis
Effect of lipoprotein (a) on platelet activation induced by platelet-activating factor: role of apolipoprotein (a) and endogenous PAF-acetylhydrolase
Cardiovasc Res, July 1, 2004; 63(1): 130 - 138.
[Abstract] [Full Text] [PDF]


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CirculationHome page
P. M Ridker, N. J. Brown, D. E. Vaughan, D. G. Harrison, and J. L. Mehta
Established and Emerging Plasma Biomarkers in the Prediction of First Atherothrombotic Events
Circulation, June 29, 2004; 109(25_suppl_1): IV-6 - IV-19.
[Full Text] [PDF]


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CirculationHome page
S. C. Smith Jr, R. V. Milani, D. K. Arnett, J. R. Crouse III, M. M. McDermott, P. M Ridker, R. S. Rosenson, K. A. Taubert, and P. W.F. Wilson
Atherosclerotic Vascular Disease Conference: Writing Group II: Risk Factors
Circulation, June 1, 2004; 109(21): 2613 - 2616.
[Full Text] [PDF]


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J Am Coll CardiolHome page
H. D. Wu, L. Berglund, C. Dimayuga, J. Jones, R. R. Sciacca, M. R. Di Tullio, and S. Homma
High lipoprotein(a) levels and small apolipoprotein(a) sizes are associated with endothelial dysfunction in a multiethnic cohort
J. Am. Coll. Cardiol., May 19, 2004; 43(10): 1828 - 1833.
[Abstract] [Full Text] [PDF]


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J. Clin. Endocrinol. Metab.Home page
E. R. Christ, M. H. Cummings, N. Jackson, M. Stolinski, P. J. Lumb, A. S. Wierzbicki, P. H. Sonksen, D. L. Russell-Jones, and A. M. Umpleby
Effects of Growth Hormone (GH) Replacement Therapy on Low-Density Lipoprotein Apolipoprotein B100 Kinetics in Adult Patients with GH Deficiency: A Stable Isotope Study
J. Clin. Endocrinol. Metab., April 1, 2004; 89(4): 1801 - 1807.
[Abstract] [Full Text] [PDF]


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Arterioscler. Thromb. Vasc. Bio.Home page
S. E. Humphries, P. M. Ridker, and P. J. Talmud
Genetic Testing for Cardiovascular Disease Susceptibility: A Useful Clinical Management Tool or Possible Misinformation?
Arterioscler Thromb Vasc Biol, April 1, 2004; 24(4): 628 - 636.
[Abstract] [Full Text] [PDF]


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ANN INTERN MEDHome page
P. Muntner, L. L. Hamm, J. W. Kusek, J. Chen, P. K. Whelton, and J. He
The Prevalence of Nontraditional Risk Factors for Coronary Heart Disease in Patients with Chronic Kidney Disease
Ann Intern Med, January 6, 2004; 140(1): 9 - 17.
[Abstract] [Full Text] [PDF]


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J. Am. Soc. Nephrol.Home page
M. Trovati and F. Cavalot
Optimization of Hypolipidemic and Antiplatelet Treatment in the Diabetic Patient with Renal Disease
J. Am. Soc. Nephrol., January 1, 2004; 15(90010): S12 - 20.
[Abstract] [Full Text]


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CirculationHome page
N. Sattar, D. W. McCarey, H. Capell, and I. B. McInnes
Explaining How "High-Grade" Systemic Inflammation Accelerates Vascular Risk in Rheumatoid Arthritis
Circulation, December 16, 2003; 108(24): 2957 - 2963.
[Abstract] [Full Text] [PDF]


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Clin. Chem.Home page
S. M. Marcovina, M. L. Koschinsky, J. J. Albers, and S. Skarlatos
Report of the National Heart, Lung, and Blood Institute Workshop on Lipoprotein(a) and Cardiovascular Disease: Recent Advances and Future Directions
Clin. Chem., November 1, 2003; 49(11): 1785 - 1796.
[Abstract] [Full Text] [PDF]


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J. Thorac. Cardiovasc. Surg.Home page
S. N. Pokrovsky, M. V. Ezhov, L. N. Il'ina, O. I. Afanasieva, V. Y. Sinitsyn, A. A. Shiriaev, and R. S. Akchurin
Association of lipoprotein(a) excess with early vein graft occlusions in middle-aged men undergoing coronary artery bypass surgery
J. Thorac. Cardiovasc. Surg., October 1, 2003; 126(4): 1071 - 1075.
[Abstract] [Full Text] [PDF]


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J. Biol. Chem.Home page
G. Tsurupa, B. Ho-Tin-Noe, E. Angles-Cano, and L. Medved
Identification and Characterization of Novel Lysine-independent Apolipoprotein(a)-binding Sites in Fibrin(ogen) {alpha}C-domains
J. Biol. Chem., September 26, 2003; 278(39): 37154 - 37159.
[Abstract] [Full Text] [PDF]


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Arterioscler. Thromb. Vasc. Bio.Home page
T. Huby, V. Afzal, C. Doucet, R. M. Lawn, E. L. Gong, M. J. Chapman, J. Thillet, and E. M. Rubin
Regulation of the Expression of the Apolipoprotein(a) Gene: Evidence for a Regulatory Role of the 5' Distal Apolipoprotein(a) Transcription Control Region Enhancer in Yeast Artificial Chromosome Transgenic Mice
Arterioscler Thromb Vasc Biol, September 1, 2003; 23(9): 1633 - 1639.
[Abstract] [Full Text] [PDF]


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JAMAHome page
D. G. Hackam and S. S. Anand
Emerging Risk Factors for Atherosclerotic Vascular Disease: A Critical Review of the Evidence
JAMA, August 20, 2003; 290(7): 932 - 940.
[Abstract] [Full Text] [PDF]


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Proc. Natl. Acad. Sci. USAHome page
G. J. Grover, K. Mellstrom, L. Ye, J. Malm, Y.-L. Li, L.-G. Bladh, P. G. Sleph, M. A. Smith, R. George, B. Vennstrom, et al.
Selective thyroid hormone receptor-{beta} activation: A strategy for reduction of weight, cholesterol, and lipoprotein (a) with reduced cardiovascular liability
PNAS, August 19, 2003; 100(17): 10067 - 10072.
[Abstract] [Full Text] [PDF]


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HeartHome page
S van Wissen, T J Smilde, M D Trip, T. de Boo, J J P Kastelein, and A F H Stalenhoef
Long term statin treatment reduces lipoprotein(a) concentrations in heterozygous familial hypercholesterolaemia
Heart, August 1, 2003; 89(8): 893 - 896.
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J. Lipid Res.Home page
R. A. Barkley, A. C. Brown, C. L. Hanis, S. L. Kardia, S. T. Turner, and E. Boerwinkle
Lack of genetic linkage evidence for a trans-acting factor having a large effect on plasma lipoprotein[a] levels in African Americans
J. Lipid Res., July 1, 2003; 44(7): 1301 - 1305.
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Mayo Clin Proc.Home page
M. Miller
Niacin as a Component of Combination Therapy for Dyslipidemia
Mayo Clin. Proc., June 1, 2003; 78(6): 735 - 742.
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ScienceHome page
D. Boffelli, J. McAuliffe, D. Ovcharenko, K. D. Lewis, I. Ovcharenko, L. Pachter, and E. M. Rubin
Phylogenetic Shadowing of Primate Sequences to Find Functional Regions of the Human Genome
Science, February 28, 2003; 299(5611): 1391 - 1394.
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CirculationHome page
S. R. Holmer, C. Hengstenberg, H.-G. Kraft, B. Mayer, M. Poll, S. Kurzinger, M. Fischer, H. Lowel, G. Klein, G. A.J. Riegger, et al.
Association of Polymorphisms of the Apolipoprotein(a) Gene With Lipoprotein(a) Levels and Myocardial Infarction
Circulation, February 11, 2003; 107(5): 696 - 701.
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CirculationHome page
J. C. Longenecker, M. J. Klag, S. M. Marcovina, N. R. Powe, N. E. Fink, F. Giaculli, and J. Coresh
Small Apolipoprotein(a) Size Predicts Mortality in End-Stage Renal Disease: The CHOICE Study
Circulation, November 26, 2002; 106(22): 2812 - 2818.
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EndocrinologyHome page
M. J. Evans, H. A. Harris, C. P. Miller, S. K. Karathanasis, and S. J. Adelman
Estrogen Receptors {alpha} and {beta} Have Similar Activities in Multiple Endothelial Cell Pathways
Endocrinology, October 1, 2002; 143(10): 3785 - 3795.
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Clin. Chem.Home page
M. Akaike, H. Azuma, A. Kagawa, K. Matsumoto, I. Hayashi, K. Tamura, T. Nishiuchi, T. Iuchi, N. Takamori, K.-i. Aihara, et al.
Effect of Aspirin Treatment on Serum Concentrations of Lipoprotein(a) in Patients with Atherosclerotic Diseases
Clin. Chem., September 1, 2002; 48(9): 1454 - 1459.
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Diabetes CareHome page
C. Gazzaruso, A. Garzaniti, S. Giordanetti, C. Falcone, E. De Amici, D. Geroldi, and P. Fratino
Assessment of Asymptomatic Coronary Artery Disease in Apparently Uncomplicated Type 2 Diabetic Patients: A role for lipoprotein(a) and apolipoprotein(a) polymorphism
Diabetes Care, August 1, 2002; 25(8): 1418 - 1424.
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Arterioscler. Thromb. Vasc. Bio.Home page
C. Kang, M. Dominguez, S. Loyau, T. Miyata, V. Durlach, and E. Angles-Cano
Lp(a) Particles Mold Fibrin-Binding Properties of Apo(a) in Size-Dependent Manner: A Study With Different-Length Recombinant Apo(a), Native Lp(a), and Monoclonal Antibody
Arterioscler Thromb Vasc Biol, July 12, 2002; 22(7): 1232 - 1238.
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