[1] Kings Coll London, Inst Psychiat, Dept Psychosis Studies, London, England
[2] Univ Palermo, Dept Expt Biomed & Clin Neurosci, Palermo, Italy
[3] Kings Coll London, Inst Psychiat, MRC Social Genet & Dev Psychiat Ctr, London, England
[4] Mt Sinai Sch Med, Dept Psychiat, New York, NY USA
[5] Kings Coll London, Inst Psychiat, Dept Psychol, London, England