1. Department of Kinesiology and Health Education; University of Texas; Austin Texas
2. Department of Health Management and System Sciences, School of Public Health and Information Sciences; University of Louisville; Louisville Kentucky
3. Department of Anthropology; University of Louisville; Louisville Kentucky
4. Escuela Nacional de Antropología e Historia; Instituto Nacional de Antropología; México DF, México
5. Comision Nacional para el Desarrollo de los Pueblos Indígenas; México DF, México