1. Von Roenn JH, Cleeland CS, Gonin R, et al. Physician attitudes and practice in cancer pain management. A survey from the Eastern Cooperative Oncology Group. Ann Intern Med 1993; 119: 121–126.
2. Weiner DK, Hanlon JT. Pain in nursing home residents. Drugs Aging 2001; 18: 13–29.
3. Joint Commission on Accreditation of Healthcare Organizations. Pain Assessment and Management: An Organizational Approach. Oakbrook Terrace, IL: Joint Commission on Accreditation of Healthcare Organizations; 2000: 5.
4. The AGS Panel on Persistent Pain in Older Persons. The management of persistent pain in older adults. J Am Geriatr Soc 2002; 50 (6): S209.
5. Gloth FM III, Scheve AA, Stober CV, Chow S, Prosser J. The Functional Pain Scale (FPS): reliability, validity, and responsiveness in a senior population. J Am Med Dir Assoc 2001; 2 (3): 110–114