[1] Kings Coll London, Inst Psychiat, Dept Psychosis Studies, London SE5 8AF, England
[2] Kings Coll London, Inst Psychiat, Ctr Econ Mental Hlth, London SE5 8AF, England
[3] Kings Coll London, Inst Psychiat, Hlth Serv & Populat Res Dept, London SE5 8AF, England
[4] Trinity Coll Dublin, Dept Psychiat, Eire, Ireland
[5] Univ Westminster, Dept Psychol, London W1R 8AL, England
[6] Univ Cambridge, Dept Psychiat, Cambridge CB2 1TN, England
[7] Univ Nottingham, Dept Psychiat, Nottingham NG7 2RD, England
[8] Kings Coll London, Inst Psychiat, Sect Social Psychiat, London SE5 8AF, England