1. Ob/Gyn Associates, Portland, ME, USA
2. Maimonides Medical Center, Brooklyn, NY, USA
3. University of Texas Medical School, Houston, TX, USA
4. University of Pennsylvania School of Medicine, Philadelphia, PA, USA
5. Harvard Medical School, Boston, MA, USA
6. University of South Carolina School of Medicine, Columbia, SC, USA
7. Medical Group Obstetrix/Ped, Phoenix, AZ, USA
8. Florida College of Health Sciences, Orlando, FL, USA
9. Brigham and Women’s Hospital, Boston, MA, USA