1. Department of Epidemiology, University of Washington, Seattle, WA, USA
2. Department of Research and Programs, Kenyatta National Hospital, Nairobi, Kenya
3. Kenyatta National Hospital, Nairobi, Kenya
4. Department of Global Health, University of Washington, Seattle, WA, USA
5. Psychosocial and Community Health, University of Washington, Seattle, WA, USA
6. University of Washington, Department of Medicine, Seattle, WA, USA
7. Department of Pediatrics, University of Washington, Seattle, WA, USA