1. Yale University School of Medicine, Yale University School of Public Health, Division of Maternal Fetal Medicine, New Haven, CT, USA
2. Yale University School of Public Health, New Haven, CT, USA
3. Department of Obstetrics and Gynecology, and Community Health, Hôpital Albert Schweitzer, Port au Prince, Haiti
4. Department of Surgery, Hôpital Albert Schweitzer, Port au Prince, Haiti
5. Hospital of St. Raphael, Department of Obstetrics and Gynecology, New Haven, CT, USA