Obstet Gynecol
Smid MC, Clifton RG, Rood K, Srinivas S, Simhan HN, Casey BM, Longo M, Landau R, MacPherson C, Bartholomew A, Sowles A, Reddy UM, Rouse DJ, Bailit JL, Thorp JM Jr, Chauhan SP, Saade GR, Grobman WA, Macones GA, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) Maternal-Fetal Medicine Units (MFMU) Network*
doi: 10.1097/AOG.0000000000005649