[1] Univ Bergen, Dept Hlth Promot & Dev, Fac Psychol, N-5020 Bergen, Norway
[2] Norwegian Inst Publ Hlth, Div Mental Hlth, Oslo, Norway
[3] Univ Cape Town, Hlth Syst Res Unit, South African Med Res Council, Adolescent Hlth Res Unit,Dept Psychiat & Mental H, ZA-7700 Rondebosch, South Africa
[4] Univ Limpopo, Sch Hlth Sci, Hlth Promot Unit, Sovenga, South Africa
[5] Univ Hlth & Allied Sci, Dar Es Salaam, Tanzania