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In the article by Hsia et al, “Calcium/Vitamin D Supplementation and Cardiovascular Events” (Circulation. 2007;115:846–854), the description of the vitamin D supplement in the first paragraph of Methods was imprecise and the location of GlaxoSmithKline, the manufacturer, was incorrect. The sentence should read, “Women provided written informed consent in a form approved by local institutional review boards and were randomly assigned to a calcium and vitamin D supplement (containing calcium carbonate, 500 mg as elemental calcium, with vitamin D3 200 IU twice daily) (GlaxoSmithKline Consumer Healthcare, Parsippany, NJ) or matching placebo.”
This correction has been made to the current online version of the article, available at http://circ.ahajournals.org/cgi/content/full/115/7/846. The authors regret the error.