[1] Woodbridge Hosp, Inst Mental Hlth, Dept Early Psychosis Intervent, Singapore 539747, Singapore
[2] Woodbridge Hosp, Inst Mental Hlth, Dept Adult Psychiat, Singapore, Singapore
[3] Harvard Univ, Sch Med, McLean Hosp, Schizophrenia & Bipolar Disorders Program, Belmont, MA 02478 USA
[4] Hillside Hosp, Div N Shore, Dept Psychiat, Long Isl Jewish Hlth Syst, New York, NY USA
[5] Albert Einstein Coll Med, New York, NY USA