1. Department of Obstetrics and Gynecology, University of Nairobi, Nairobi, Kenya.
2. Department of Global Health, University of Washington, Seattle, Washington.
3. Department of Epidemiology, University of Washington, Seattle, Washington.
4. Division of Medicine, Moi Teaching and Referral Hospital, Eldoret, Kenya.
5. AMPATH Partnership, Eldoret, Kenya.
6. Department of Medicine, School of Medicine, College of Health Sciences, Moi University, Eldoret, Kenya.
7. Department of Medicine, University of Washington, Seattle, Washington.
8. Department of Medicine, Duke Clinical Research Institute and Duke Global Health Institute, Duke University, Durham, North Carolina.