iatry 66, no. 8 (2009): 848-856, doi: 10.1001/archgenpsychiatry.2009.81. 80 IL C. Kessler, R A. Berglund, O. Demler, R. Jin, K. IL Merikangas, and E.E. Walters, "Lifetime Prevalence and Age-of-Onset Distributions of DSM-IV Disorders in the National Comorbidity Survey Replica- tion," Archives of General Psyc