Affiliation: | 1. World Health Organization , Geneva, Switzerland;2. Department of Population and International Health, Harvard School of Public Health , Boston, Massachusetts, USA;3. Department of Anthropology , Emory University , Atlanta, Georgia, USA;4. Department of Anthropology , University of Massachusetts , Amherst, Massachusetts, USA;5. Social and Demographic Research Institute , University of Massachusetts , Amherst, Massachusetts, USA |