In the article, “Hypertrophic Cardiomyopathy: Distribution of Disease Genes, Spectrum of Mutations, and Implications for a Molecular Diagnosis Strategy,” by Richard et al, which appeared in the May 6, 2003, issue of the journal (Circulation. 2003;107:2227–2232), the authors regret that errors occurred in Tables 2 and 4⇓. In Table 2, Exon 30, Nucleotide Change C19222T, the value listed under Coding Effect (E1377M) should be replaced with T1377M. In Table 4, row 3, the value listed under Troponin T (P120V) should be replaced with F110V. Also in Table 4, row 4, the value listed under Regulatory Light Chain (D166L) should be replaced with D166V. The corrected rows of Tables 2 and 4⇓ appear below.