[1] Univ Hong Kong, Dept Psychiat, Queen Mary Hosp, Hong Kong, Hong Kong, Peoples R China
[2] Chinese Univ Hong Kong, Dept Psychol, Sha Tin 100083, Peoples R China
[3] Kwai Chung Hosp, Child & Adolescent Psychiat Team, Hong Kong, Hong Kong, Peoples R China
[4] NYU, Ctr Child Study, New York, NY 10012 USA
[5] Columbia Univ, Div Child & Adolescent Psychiat, New York, NY 10027 USA
[6] New York State Psychiat Inst & Hosp, New York, NY USA