1. a Ministry of Health , Kigali , Rwanda
2. d Department of Global Health and Social Medicine , Harvard Medical School , Boston , USA
3. b FXB Center , Harvard School of Public Health , Boston , USA
4. c Center for Global Health , Massachusetts General Hospital , Boston , USA
5. e University of Rwanda , Butare , Rwanda
6. f Division of Global Health Equity , Brigham and Women's Hospital , Boston , USA