[1] Univ Cape Town, Dept Psychiat & Mental Hlth, Mental Hlth & Poverty Project, ZA-7700 Rondebosch, South Africa
[2] Univ Zambia, Demog Div, Dept Social Dev Studies, Lusaka, Zambia
[3] Univ Zambia, Dept Psychiat, Chainama Coll Hlth Sci, Lusaka, Zambia
[4] Univ Toronto, Ctr Addict & Mental Hlth, Hlth Syst Res & Consulting Unit, Toronto, ON M5S 1A1, Canada
[5] Univ Bergen, Res Ctr Hlth Promot, N-5020 Bergen, Norway