1. Department of Obstetrics and Gynecology, Mount Sinai School of Medicine, New York, New York.
2. Basic Health International, San Salvador, El Salvador.
3. Columbia University Mailman School of Public Health, New York, New York.
4. University of Massachusetts Amherst, Amherst, Massachusetts.
5. Obstetrics and Gynecology, New York University School of Medicine, New York, New York.