1. Department of Psychiatry and Mental Health, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
2. Department of Global Health and Population, Harvard Medical School, Boston, MA, USA
3. National Institute for Health Research, Mwanza, Tanzania
4. Department of Global Health and Social Medicine, Harvard Medical School, Boston, MA, USA
5. Department of Epidemiology, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania