1. School of Public Health and School of Medicine; Emory University; Atlanta GA
2. Statistics and Epidemiology; Research Triangle Institute; Research Triangle Park NC
3. Eunice Kennedy Shriver National Institute of Child Health and Human Development; Bethesda MD
4. Obstetrics & Gynecology; University of Texas Medical Branch; Galveston UT
5. University of Utah School of Medicine; Salt Lake City UT
6. University of Texas Health Sciences Center; San Antonio TX
7. Obstetrics and Gynecology; Brown University; Providence RI
8. Obstetrics and Gynecology; Columbia University Medical Center; New York NY