[1] Inst Psychiat, Div Psychol Med, Dept Psychol Med, London SE5 8AF, England
[2] Inst Psychiat, Dept Neuroimaging, London SE5 8AF, England
[3] Kings Coll London, Inst Psychiat, Social Genet Dev & Psychiat Ctr, London, England
[4] Univ London St Georges Hosp, Sch Med, Dept Psychol, London SW17 0RE, England
[5] Univ Hong Kong, Dept Psychiat, Hong Kong, Hong Kong, Peoples R China