1. Department of Andrology (P.Y.L., D.J.H.), ANZAC Research Institute and Concord Hospital, Concord 2139, Australia
2. Division of Endocrinology (R.S.S.), Department of Medicine, LABiomed and Harbor-UCLA Medical Center, Torrance, California 90509
3. Department of Medicine (B.D.A.), Veterans Affairs Puget Sound Health Care System and University of Washington, Seattle, Washington 98195
4. Division of Reproductive and Developmental Sciences (R.A.A.), The Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
5. Department of Medicine (W.J.B.), University of Washington, Seattle, Washington 98195
6. Bayer Schering Pharma AG (J.E.), 93 HRB 283 Berlin, Germany
7. Department of Endocrinology (Y.-Q.G.), National Research Institute for Family Planning, Beijing 100081, China
8. Department of Translational Medicine Department (W.M.K.), N.V. Organon, a part of Schering-Plough Corporation, Oss NL-5340 BH, The Netherlands
9. Department of Prince Henry's Institute and Monash Medical Centre (R.I.M.), Monash University, Clayton 3168, Australia
10. Departments of Obstetrics and Gynecology (M.C.M.), S. Orsola-Malpighi Hospital and University of Bologna, 40138 Bologna, Italy
11. Institute of Reproductive Medicine (E.N., M.Z.), University Hospital, D-48149 Münster, Germany
12. Department of Center for Biomedical Research (R.S.-W.), Population Council, and Rockefeller University, New York, New York 10021
13. The United Nations Development Programme/United Nations Fund for Population Activities/World Health Organization/World Bank Special Programme of Research (K.V.), Development and Research Training in Human Reproduction, Department of Reproductive Health and Research, World Health Organization, 1211 Geneva 27, Switzerland
14. Department of Jiangsu Family Planning Research Institute (X.-H.W.), Jiangsu 210029, China
15. Department of Endocrinology (F.C.W.W.), Manchester Royal Infirmary, University of Manchester, Manchester M13 9WL, United Kingdom
16. General Clinical Research Center (C.W.), LABiomed and Harbor-UCLA Medical Center, Torrance, California 90509