[1] Univ Cincinnati, Med Ctr, Dept Obstet & Gynecol, Div Maternal Fetal Med, Cincinnati, OH USA
[2] Cincinnati Childrens Hosp Med Ctr, Perinatal Inst, Ctr Prevent Preterm Birth, Cincinnati, OH 45229 USA
[3] Cincinnati Childrens Hosp Med Ctr, Div Cardiol, Fetal Heart Program, Cincinnati, OH 45229 USA