1. Department of Obstetrics and Gynecology, Maimonides Medical Center, Brooklyn, New York
2. MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
3. Department of Obstetrics and Gynecology, Georgetown University Hospital, MedStar Health, Washington, District of Columbia
4. Intermountain HealthCare and University of Utah, Salt Lake City, Utah
5. Baystate Medical Center, Springfield, Massachusetts
6. Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
7. Department of Obstetrics and Gynecology Texas Children's Hospital, University of Texas Health Science Center at Houston, Houston, Texas
8. MetroHealth Medical Center, Cleveland, Ohio
9. Department of Obstetrics and Gynecology, University of Miami, Miami, Florida
10. Department of Obstetrics and Gynecology, University of Illinois at Chicago, Chicago, Illinois
11. Christiana Care Health System, Wilmington, Delaware
12. The EMMES Corporation, Rockville, Maryland
13. Summa Health System, Akron City Hospital, Akron, Ohio