1. Ainslie, J.D., Jones, M.B. and Stiefel, J.R. (1965). Practical drug evaluation method: Imipramine in depressed outpatients. Arch. Gen. Psychiatry 12: 368–373.
2. Akiskal, H.S. (1982). Biochemical and psychopharmacological strategies in the study of anxiety disorders and their phenomenology. Presented at Anxiety Disorders Workshop sponsored by the Clinical Research Branch, NIMH, Bethesda, MD, May 6–7.
3. American Psychiatric Association (1980). Diagnostic and Statistical Manual of Mental Disorders (Third Edition). Washington, D.C.: American Psychiatric Association.
4. Beck, A.T. (1971). Cognition, affect, and psychopathology. Arch. Gen. Psychiatry 24: 495–500.
5. Campbell, D.T., and Stanley, J.C. (1963). Experimental and Quasi-Experimental Designs for Research. Chicago: Rand McNally and Co.