1. Department of Anthropology, Laboratory for Evolutionary Endocrinology; University of Illinois; Urbana; Illinois; 61801
2. Department of Human Evolutionary Biology; Harvard University; Cambridge; Massachusetts; 02138
3. Polish Academy of Sciences; Institute of Anthropology; Wroclaw; 50-951; Poland
4. Department of Environmental Health; Institute of Public Health, Jagiellonian University, Medical College; 31-531; Krakow; Poland
5. Department of Anthropology; Reproductive Ecology Laboratory; Yale University; New Haven; Connecticut; 06511