1. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, MetroHealth Medical Center-Case Western Reserve University School of Medicine, Cleveland, OH, USA
2. Department of Obstestrics and Gynecology, The Ohio State University College of Medicine, Columbus, OH, USA
3. Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, San Antonio Uniformed Services Health Education Consortium, San Antonio, TX, USA
4. Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, The Ohio State University College of Medicine, Columbus, OH, USA