1. Department of Medicine, Brown University, Providence, RI, USA
2. Anthropology, George Washington University, Washington, DC, USA
3. Brown University School of Public Health, Providence, RI, USA
4. Rhode Island Public Health Institute, Providence, RI, USA
5. Johns Hopkins University Bloomberg School of Public Health, International Health, Baltimore, MD, USA
6. University of Amsterdam, Amsterdam Institute for Social Science Research, Amsterdam, Netherlands