Affiliation: | 1. Department of Obstetrics, Gynecology and Reproductive Sciences, Magee-Womens Research Institute, University of Pittsburgh, Pittsburgh, PA, USA Center for Fetal Medicine, Magee-Womens Research Institute, Pittsburgh, PA, USA;2. Department of Obstetrics, Gynecology and Reproductive Sciences, Magee-Womens Research Institute, University of Pittsburgh, Pittsburgh, PA, USA;3. Center for Fetal Medicine, Magee-Womens Research Institute, Pittsburgh, PA, USA |