1. University of North Carolina School of Medicine; Obstetrics and Gynecology; CB #7570 Chapel Hill North Carolina USA 27599-7570
2. FHI 360; Clinical Sciences; P.O. Box 13950 Research Triangle Park North Carolina USA 27709
3. FHI 360 and UNC School of Medicine; Quantitative Sciences; P.O. Box 13950 Research Triangle Park North Carolina USA NC 27709