[1] Kings Coll London, ESRC Ctr Soc & Mental Hlth, Inst Psychiat Psychol & Neurosci, London, England
[2] Univ Ibadan, Dept Psychiat, Ibadan, Nigeria
[3] Schizophrenia Res Fdn, Chennai 600101, India
[4] Univ West Indies, Dept Psychiat, St Augustine, Trinidad Tobago
[5] London Sch Hyg & Trop Med, Fac Epidemiol & Populat Hlth, London, England