1. Kessler RC, McGonagle KA, Zhao S, et al.: Lifetime and 12-month prevalence of DSM-III-R psychiatric disorders in the United States: results from the national comorbidity survey. Arch Gen Psychiatry 1994, 51:8–19.
2. Greenberg PE, Sisitsky MA, Kessler RC, et al.: The economic burden of anxiety disorders in the 1990s. J Clin Psychiatry 1999, 60:427–435.
3. Blazer DG, Hughes D, George LK, et al.: Generalized anxiety disorder. In Psychiatric Disorders in America: the Epidemiologic Catchment Area Study. Edited by Robins LN, Regier DA. New York: The Free Press; 1991:180–203.
4. Eaton WW, Dryman A, Weissman MM: Panic and phobia. In Psychiatric Disorders in America: the Epidemiologic Catchment Area Study. Edited by Robins LN, Regier DA. New York: The Free Press; 1991:155–179.
5. Karno M, Golding JM: Obsessive-compulsive disorder. In Psychiatric Disorders in America: the Epidemiologic Catchment Area Study. Edited by Robins LN, Regier DA. New York: The Free Press; 1991:204–219.