Parker SE, Mai CT, Canfield MA, Rickard R, Wang Y, Meyer RE, Anderson P, Mason CA, Collins JS, Kirby RS, Correa A.
Updated National Birth Prevalence estimates for selected birth defects in the United States, 2004-2006.
Birth Defects Res A Clin Mol Teratol. 2010;88(12):1008-16. PubMed abstract