1. University of Utah Health, Salt Lake City, Utah
2. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Arkansas for Medical Sciences, Little Rock, Arizona
3. Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California, Los Angeles, California
4. Department of Anesthesiology, University of Arkansas for Medical Sciences, Little Rock, Arizona
5. Division of Maternal-Fetal Medicine, Department of Obstetric and Gynecology, Baylor College of Medicine (Texas Children's Hospital Pavilion for Women), Houston, Texas
6. Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Vanderbilt University Medical Center Nashville, Tennessee
7. Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
8. Department of Radiology Texas Children's Hospital/Baylor College of Medicine, Houston, Texas
9. Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
10. Yale School of Medicine, New Haven, Connecticut