1. Department of Obstetrics and Gynecology, Maternal Fetal Medicine Division, Oregon Health & Science University, Portland, OR, USA;
2. Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL, USA;
3. Department of Obstetrics and Gynecology, Maternal Fetal Medicine Division, University Hospitals Case Medical Center, Cleveland, OH, USA;
4. Department of Pediatrics, Division of Neonatology, Ramathibodi Hospital, Mahidol University, Salaya, Thailand;
5. Department of Pediatrics, Rainbow Babies and Children’s Hospital, Cleveland, OH, USA