1. Department of Anthropology, Central Washington University, Farrell Hall, Ellensburg, WA 98926, USA
2. Yakima Valley Farm Workers Clinic, P.O. Box 190, 518 West First Avenue, Toppenish, WA 98948, USA
3. School of Medicine, University of Washington, 660 South Euclid Avenue, St. Louis, MO 63110, USA