1. Department of Medicine Indiana University Indianapolis IN USA
2. Department of Epidemiology Johns Hopkins Bloomberg School of Public Health Baltimore MD USA
3. Academic Model Providing Access to Healthcare (AMPATH) Eldoret Kenya
4. Department of Biostatistics Indiana University Indianapolis IN USA
5. Department of Paediatrics Moi Teaching and Referral Hospital Eldoret Kenya
6. Department of Biostatistics Brown University Providence RI USA