1. Department of Obstetrics and Gynecology Icahn School of Medicine at Mount Sinai New York New York USA
2. Department of Obstetrics and Gynecology University of Florida College of Medicine Gainesville Florida USA
3. Department of Obstetrics and Gynecology Massachusetts General Hospital, Harvard Medical School Boston Massachusetts USA
4. Department of Obstetrics and Gynecology Columbia University School of Medicine New York New York USA
5. Department of Obstetrics and Gynecology University of California at San Diego San Diego California USA
6. American Institute of Ultrasound in Medicine Laurel Maryland USA
7. Department of Obstetrics and Gynecology University of Texas Southwestern Medical Center Dallas Texas USA
8. Department of Obstetrics and Gynecology Baylor College of Medicine Houston Texas USA
9. Department of Obstetrics and Gynecology David Geffen School of Medicine at UCLA Los Angeles California USA
10. Department of Obstetrics and Gynecology Eastern Virginia Medical School Norfolk Virginia USA
11. Department of Obstetrics, Gynecology, and Reproductive Sciences University of California San Francisco California USA
12. Department of Obstetrics and Gynecology Brigham and Women's Hospital, Harvard Medical School Boston Massachusetts USA