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