1. Department of Anthropology; University of Washington; Seattle Washington
2. Center for Studies in Demography and Ecology; University of Washington; Seattle Washington
3. Department of Anthropology; Northwestern University; Evanston Illinois
4. Institute for Policy Research, Northwestern University; Evanston Illinois
5. Division of Endocrinology, Metabolism and Molecular Medicine, Department of Medicine; Northwestern University Feinberg School of Medicine; Chicago Illinois
6. Center for Genetic Medicine; Northwestern University Feinberg School of Medicine; Chicago Illinois