1. Department of Medicine, University of Washington, Seattle, Washington
2. Department of Medicine, Division of Endocrinology, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California
3. Contraception Development Program, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
4. SRI International Biosciences Division, Menlo Park, California