1. Division of Infectious Diseases, Alpert Medical School, Brown University, Providence, RI, USA
2. Academic Model Providing Access to Healthcare (AMPATH), Eldoret, Kenya
3. Department of Medicine, School of Medicine, College of Health Sciences, Moi University, Eldoret, Kenya
4. Center for Statistical Sciences, Brown University, Providence, RI, USA
5. Department of Biostatistics, School of Public Health, Brown University, Providence, RI, USA