1. School of Medicine, Washington University in St. Louis, 660 S Euclid Ave, Saint Louis, MO, USA
2. Department of Plant Sciences, Microbiology & Biotechnology Makerere University, University Rd, Kampala, Uganda
3. Ministry of Health, P.O. Box 7272, Kampala, Uganda
4. Department of Anthropology, Washington University in St. Louis, 1 Brookings Drive, Saint Louis, MO, USA
5. Department of Primary Care and Population Sciences, University of Southampton, Building 37, Highfield Campus, University Road, Southampton, UK