1. FHI 360; Clinical Sciences; P.O. Box 13950 Research Triangle Park North Carolina USA 27709
2. University of California, San Francisco General Hospital; Obstetrics and Gynecology and Reproductive Sciences; 1001 Potrero Avenue Ward 6D San Francisco California USA CA 94110
3. University of North Carolina, School of Medicine; Obstetrics and Gynecology; CB#7570 Chapel Hill North Carolina USA 27599-7570
4. FHI; Clinical Sciences; P.O. Box 13950 Research Triangle Park North Carolina USA 27709
5. FHI 360 and UNC School of Medicine; Quantitative Sciences; P.O. Box 13950 Research Triangle Park North Carolina USA NC 27709