1. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Rochester Medical Center, Rochester, NY, USA
2. Department of Obstetrics and Gynecology, University of Rochester Medical Center, Rochester, NY, USA
3. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX, USA
4. Granger Medical Clinic, Murray, UT, USA
5. St. Luke’s Hospital, Maumee, Ohio, USA
6. St. Anne’s Hospital, Toledo, Ohio, USA
7. Spectrum Health Medical Group, Grand Rapids, MI, USA
8. Helen DeVos Children’s Hospital, Grand Rapids, MI, USA