Miller R, Stodgell C, Katzman P, Friedman A, Friedman M, Ruffolo L, Penmetsa A, Salamone L, Salafia C, Chen J, Schadt E, Hao K, Littman L, Landrigan P, Walker C, Darrah T, Li A, Dassayake P, Szabo S, Aagaard K, Hobbs C, Clark E, Varner M, Dole N, Culhane J, Swanson J, Thiex N, Murray J, Busch T, Misra D, Durkin M, Moyle J, Kasten C, O'Brien B. Human placental study of genetics/genomic, environmental contaminant and morphology assessments from 12 U.S. Counties – Methods and results from the U.S. National Children’s Study (NCS). Placenta 2014, 35: a2. DOI: 10.1016/j.placenta.2014.06.007.Peer-Reviewed Original Research