3Foley KM, Posner JB. Pain and its management. In: Wyngaarden JB, Smith LH. Cecil textbook of medicine. 18th ed. Philadelphia: WB Saunders Company, 1988. 104-112.
4Bonica JJ. The management of pain of cancer. J Mich State Med Soc, 1953, 52: 284-290.
5Merskey H, Watson GD. The lateralisation of pain. Pain, 1979, 7:271-280.
6Merskey H. Logic, truth and language in concepts of pain. Qual Life Res, 1994, 3 Suppl 1: S69-76.
7No authors listed. Recommendations for the medical management of osteoarthfitis of the hip and knee: 2000 update. American College of Rheumatology Subcommittee on Osteoarthfitis Guidelines. Arthritis Rheum, 2000, 43: 1905-1915.
8Ong CK, Lirk P, Tan CH, et al. An evidence-based update on nonsteroidal anti-inflammatory drugs. Clin Med Res, 2007, 5: 19-34.
9Bloodworth D. Issues in opioid management. Am J Phys Med Rehabil, 2005, 84(3 Suppl):S42-55.
10Katz WA, Rothenberg R. Section 4: treating the patient in pain. J Clin Rheumatol, 2005, 11(2 Suppl): S16-28.