[1] Kilimanjaro Christian Med Univ Coll, Dept Epidemiol & Biostat, Moshi Kilimanjaro Region, Tanzania
[2] UNFPA Asia & Pacific Reg Off APRO, Bangkok 10200, Thailand
[3] Univ London London Sch Hyg & Trop Med, Dept Global Hlth & Dev, London WC1H 9SH, England
[4] Muhimbili Univ Hlth & Allied Sci, Dept Psychiat & Mental Hlth, Dar Es Salaam, Tanzania