1. American Pain Society (APS). Chronic pain in America: roadblocks to relief. 1999. Available at: http://www.ampainsoc.org/whatsnew/toc_road.htm. Accessed October 21, 2001.
2. The epidemiology of chronic pain in the community;Elliott;Lancet,1999
3. Prevalence and impact of arthritis by race and ethnicity—United States, 1989–1991;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,1996
4. Quality of life and chronic nonmalignant pain;Gerstle;Pain Management Nursing,2001
5. Unscheduled readmissions for uncontrolled symptoms. A health care challenge for nurses;Grant;Nurs Clin North Am,1995