1. Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA
2. Department of Sociology, Pennsylvania State University, University Park, PA 16802, USA
3. Department of Anthropology, University of New Mexico, Albuquerque, NM 87131-1466, USA
4. US National Science Foundation, Alexandria, VA, USA
5. Department of Population Health, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
6. The International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
7. Yunnan University, Kunming, Yunnan, People's Republic of China
8. Division of Humanities, University of Otago, Dunedin 9054, New Zealand
9. Department of Anthropology, University of Connecticut, Storrs, CT 06269, USA
10. Department of Anthropology, Binghamton University (SUNY), Binghamton, NY 13902-6000, USA