1. Department of Obstetrics, Gynecology and Reproductive Medicine, Division of Maternal-Fetal Medicine; McGovern School of Medicine, University of Texas Health Science Center at Houston; Houston TX USA
2. Department of Pediatrics, Pediatric Research Center; McGovern School of Medicine, University of Texas Health Science Center at Houston; Houston TX USA
3. Department of Obstetrics and Gynecology; Ohio State University College of Medicine; Columbus OH USA
4. Department of Obstetrics, Gynecology and Reproductive Medicine, Division of Maternal-Fetal Medicine; University of Texas School of Medicine at Houston; Houston TX USA