1. Department of Anthropology and Center for Studies in Demography and Ecology
2. Department of Obstetrics and Gynecology, and
3. Department of Biology, University of Massachusetts, Boston, MA 02125
4. Department of Biological Regulation, Weizmann Institute of Science, Rehovet 76100, Israel
5. Population Health and Reproduction and
6. Department of Medicine, Division of Metabolism, Endocrinology, and Nutrition, University of Washington, Seattle WA 98195
7. Obstetrics and Gynecology, University of California, Davis, CA 95616
8. Department of Anthropology and Population Research Institute, Pennsylvania State University, University Park, PA 16802
9. Departments of