1. Murray, CJL, Lopez, AD (eds): The Global Burden of Disease: A Comprehensive Assessment of Mortality and Disability from Disease, Injuries, and Risk Factors in 1990 and Projected to 2020, Vol 1. Cambridge, MA: Harvard University Press; 1996:201–395.
2. Hollon SD, DeRubeis RJ, Evans MD, et al.: Cognitive therapy and pharmacotherapy for depression: singly and in combination. Arch Gen Psychiatry 1992, 49:774–781.
3. Boland R, Keller MB: Pharmacotherapy and psychotherapy combinations. In Treatment of Recurrent Depression. Edited by Greden, JF, Washington, DC: American Psychiatric Press; 2001:59–80.
4. Greden JF: Recurrent depression: its overwhelming burden, in treatment of recurrent depression. In Treatment of Recurrent Depression. Edited by Greden JF. Washington, DC: American Psychiatric Press; 2001:1–18.
5. Kendler KS, Karkowski LM, Prescott CA: Causal relationship between stressful life events and the onset of major depression. Am J Psychiatry 1999, 156:837–841.