1. Lawrence JS, Bremner JM, Bier F. Osteo-arthrosis. Prevalence in the population and relationship between symptoms and x-ray changes. Ann Rheum Dis 1966; 25(1):1–24.
2. Cooper C. Osteoarthritis: Epidemiology. In: Klippel JH, Dieppe PA, eds. Rheumatology. Mosby, London, UK, 1994, 7.3.1–5.
3. Mankin HJ. Clinical features of osteoarthritis. In: Kelly WN, Harris EDJ, Ruddy S, Sledge CB, eds. Textbook of Rheumatology. 4th ed. W.B. Saunders Co., Philadelphia, PA, 1993, 1374–1384.
4. The Incidence and Prevalence Database for Procedures. Timely Data Resources, Sunnyvale, CA, 1995.
5. Hough AJ. Pathology of Osteoarthritis. In: Koopman WJ, ed. Arthritis and Allied Conditions. 13 ed. Williams & Wilkins, Baltimore, MD, 1997:1945–1968.