1. a Department of Psychiatry , Mbarara University of Science and Technology , Mbarara , Uganda
2. b Department of Psychiatry , Makerere University , Kampala , Uganda
3. c MRC/UVRI Uganda Research Unit on AIDS , Entebbe , Uganda
4. d London School of Hygiene and Tropical Medicine , Keppel Street, London , UK
5. e International Water and Sanitation Centre (IRC) , Dar-es-Salaam , Tanzania