1. American Psychiatric Association: Diagnostic and Statistical Manual of Mental Disorders, edn 4. Washington, D.C.: American Psychiatric Association; 1993.
2. Lipowski ZJ: Somatization and depression. Psychosomatics 1990, 31:13–21.
3. Sullivan M, Katon W: Somatization: the path between distress and somatic symptoms. Am Pain Soc J 1993, 2:141–149.
4. Aronoff GM: Psychiatric aspects of nonmalignant chronic pain: a new nosology. In Evaluation and Treatment of Chronic Pain, edn 3. Edited by Aronoff GM. Philadelphia: Williams and Wilkins; 1999: 291–300.
5. Katon WJ, Walker EA: Somatization: the cost of unmanaged care [University of Washington Courses Web Server]. Available at: http://courses.Washington.edu/hubio516/schedule.htm. Accessed January 6, 2000.