3Last CG,Perrin S,Hersen M,et al.DSM-III-R anxiety disorders in children:Sociodemographic and clinical characteristics[J].J Am Acad Child Adolesc Psychiatry,1992,31:1070-1076
4Masi G,Mucci M,Favilla L,et al.Symptomatology and comorbidity of generalized anxiety disorder in children and adolescents[J].Compr Psychiatry,1999,40:210-215
5Krasucki C,Howard R,Mann A.The relationship between anxiety disorders and age[J].Int J Geriatr Psychiatry,1998,13:79-99
6Doraiswamy PM.Contemporary management of comorbid anxiety and depression in geriatric patients[J].J Clin Psychiatry,2001,62(12):30-35
7Kessler RC,DuPont RL,Berglund P,et al.Impairment in pure and comorbid generalized anxiety disorder and major depression at 12 months in two national surveys[J].Am J Psychiatry,1999,156:1915-1923
8Bland RC,Newman SC,Orn H.Help-seeking for psychiatric disorders[J].Can J Psychiatry,1997,42:935-942
9Yonkers KA,Warshaw MG,Massion AO,et al.Phenomenology and course of generalized anxiety disorder[J].Br J Psychiatry,1996,168:308-313
10Coryell W,Endicott J,Winokur G.Anxiety syndromes as epiphenomena of primary major depression:outcome and familial psychopathology[J].Am J Psychiatry,1992,149:100-107