[1] London Sch Econ & Polit Sci, Care Policy & Evaluat Ctr, Houghton St, London WC2A 2AE, England
[2] Kings Coll London, Inst Psychiat Psychol Sr Neurosci, Hlth Serv & Populat Res Dept, London, England
[3] Univ Washington, Seattle, WA 98195 USA
[4] Kings Coll London, Inst Psychiat Psychol Sr Neurosci, Social Genet Sr Dev Psychiat Ctr, London, England
[5] Kings Coll London, ESRC Ctr Soc & Mental Hlth, London, England
[6] Queensland Univ Technol QUT, Sch Psychol & Counselling, Brisbane, Qld, Australia
[7] Kings Coll London, Inst Psychiat Psychol Sr Neurosci, Dept Psychosis Studies, London, England