[1] Columbia Univ Coll Phys & Surg, New York State Psychiat Inst, Div Clin & Genet Epidemiol, New York, NY 10032 USA
[2] Columbia Univ, Dept Psychiat, New York, NY USA
[3] Columbia Univ, Sch Publ Hlth, New York, NY USA
[4] New York State Psychiat Inst & Hosp, New York, NY USA
[5] Virginia Commonwealth Univ, Dept Psychiat, Richmond, VA USA
[6] Univ Vienna, Dept Psychiat, A-1010 Vienna, Austria
[7] Univ Pittsburgh, Dept Psychiat, Pittsburgh, PA USA