1. Epidemiology and Biostatistics Department, University of California, San Francisco (UCSF), San Francisco, CA, USA
2. Institute for Global Health Sciences, University of California, San Francisco, San Francisco CA, USA
3. Research Department, Global Programs for Research and Training, Nairobi, Kenya
4. Center for Virus Research, Kenya Medical Research Institute, Nairobi, Kenya
5. County Executive Committee, Migori, Kenya
6. Migori County Referral Hospital, Migori, Kenya
7. Center for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya