[1] London Sch Hyg & Trop Med, Dept Populat Hlth, Kennel St, London WC1E 7HT, England
[2] Addict Res Grp, Sangath, Goa, India
[3] London Sch Hyg & Trop Med, Dept Hlth Serv Res & Policy, London, England
[4] Univ Copenhagen, Dept Publ Hlth, Copenhagen, Denmark
[5] Natl Univ Kyiv Mohyla Acad, Ctr Mental Hlth & Psychosocial Support, Kiev, Ukraine
[6] HealthRight Int, New York, NY USA
[7] Vrije Univ Amsterdam, Athena Res Inst, Amsterdam, Netherlands
[8] Univ Bath, Dept Psychol, Bath, Avon, England
[9] Leibniz Inst Prevent Res & Epidemiol, Bremen, Germany
[10] Univ Bremen, Hlth Sci, Bremen, Germany