1. Department of Physiology, Wayne State University, Detroit, Michigan.
2. Department of Obstetrics and Gynecology, Wayne State University, Detroit, Michigan.
3. Department of Anatomy and Cell Biology, Wayne State University, Detroit, Michigan.
4. National Institutes of Health, NICHD, Reproductive Biology and Medicine Branch, Bethesda, Maryland.
5. Caribbean Primate Research Center, Sabana Seca, Puerto Rico.
6. Reproductive Biology Program, Caribbean Primate Research Center, Unit of Comparative Medicine, University of Puerto Rico, Sabana Seca, Puerto Rico.