1. Department of Obstetrics and Gynecology, Cooper Medical School of Rowan University, Camden, New Jersey
2. Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts
3. Department of Obstetrics and Gynecology, Valley Medical Group, Paramus, New Jersey and Clinical Professor of Obstetrics and Gynecology, Ne NYU Grossman School of Medicine, New York
4. Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Norfolk, Virginia
5. Department of Obstetrics and Gynecology, University of California, Los Angeles, California
6. Department of Obstetrics and Gynecology, University of Utah School of Medicine, Salt Lake City, Utah
7. Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
8. Edward B. Singleton Department of Radiology, Texas Children's Hospital and Baylor College of Medicine, Houstan, Texas
9. Department of Obstetrics & Gynecology, Stanford University School of Medicine, Stanford, California
10. Subspecialty Care for Women's Health, Cleveland Clinic, Beachwood, Ohio
11. Center for Fetal Medicine & Women's Ultrasound and the David Geffen School of Medicine at UCLA, Los Angeles, California
12. Department of Obstetrics and Gynecology, Beth Israel Deaconess Medical Center, Boston, Massachusetts