1. Epidemiology and Biostatistics Department, University of California, San Francisco (UCSF), San Francisco, CA 94158, USA
2. UCSF Institute for Global Health Sciences, San Francisco, CA, USA
3. Global Programs for Research and Training, Nairobi, Kenya
4. Kenya Medical Research Institute, Nairobi, Kenya
5. UCSF Department of Community Health Systems, San Francisco, CA 94143, USA
6. NYU Rory Meyers College of Nursing, New York, NY, USA
7. UCSF Department of Psychiatry, San Francisco, CA 94118, USA