Authors: Katherine Neiswanger; K Walker; Kevin W Chirigos; Cherise M Klotz; Margaret E Cooper; Kathleen M Bardi; Carla A Brandon; Seth M Weinberg; Alexandre R Vieira; Rick A Martin; Andrew E Czeizel; Eduardo E Castilla; Fernando A Poletta; Mary L Marazita Journal: Am J Med Genet A Date: 2009-12 Impact factor: 2.802