1. Department of Obstetrics and Gynecology; Eastern Virginia Medical School; Norfolk VA
2. American Institute of Ultrasound in Medicine; Laurel MD
3. Department of Radiology; Harvard Medical School, Brigham and Women's Hospital; Boston MA
4. Department of Ultrasound; Cambridge University Hospitals; Cambridge United Kingdom
5. Ultrasound Education, Obstetrics and Gynecology Residency Program, Doctors Hospital OhioHealth; Columbus OH
6. Department of Gynecology and Obstetrics; Johns Hopkins Medicine; Baltimore MD
7. Department of Obstetrics and Gynecology; Division of Women's and Fetal Imaging, Baylor College of Medicine and Texas Children's Hospital; Houston TX
8. Division of Medical Education; Dalhousie University; Halifax Nova Scotia Canada
9. Reproductive Genetics, Intermountain Healthcare, Department of Obstetrics and Gynecology; University of Utah; Salt Lake City UT
10. Department of Obstetrics and Gynecology; Columbia University Medical Center; New York NY
11. Department of Obstetrics, Copenhagen University Hospital; University of Copenhagen; Copenhagen Denmark