[1] Columbia Univ, Dept Psychiat, New York, NY 10032 USA
[2] Columbia Univ, Dept Epidemiol, New York, NY 10032 USA
[3] Columbia Univ, Dept Biostat, New York, NY 10032 USA
[4] Shantou Univ Med Coll, Injury Prevent Res Ctr, Shantou, Peoples R China
[5] Shantou Univ Med Coll, Psychol Ctr, Shantou, Peoples R China
[6] New York State Psychiat Inst & Hosp, Dept Child Psychiat, New York, NY 10032 USA