1. Department of Behavioral and Social Sciences, School of Public Health, Brown University, Rhode Island, United States
2. School of Public Health, Moi University, Eldoret, Kenya
3. Academic Model Providing Access to Healthcare (AMPATH), Eldoret, Kenya
4. Department of Behavioral Science, College of Health Sciences, School of Medicine, Moi University, Eldoret, Kenya
5. International Centre for Reproductive Health, University of Ghent, Belgium
6. School of Medicine, College of Health Sciences, Moi University, Eldoret, Kenya
7. Department of Medicine, School of Medicine, Indiana University, Indianapolis, United States