[1] New York State Psychiat Inst & Hosp, Anxiety Disorders Clin, New York, NY 10032 USA
[2] Columbia Univ, Dept Psychiat, New York, NY 10027 USA
[3] Columbia Univ, Dept Epidemiol, New York, NY 10027 USA
[4] SUNY Stony Brook, Dept Psychiat & Behav Sci, Stony Brook, NY 11794 USA