1. Osteoarthritis: new insights;Felson;Ann Intern Med,2000
2. Radiological assessment of osteo-arthrosis;Kellgren;Ann Rheum Dis,1957
3. Reliability of new indices of radiographic osteoarthritis of the hand and hip and lumbar disc degeneration;Lane;J Rheumatol,1993
4. Intraarticular sodium hyaluronate (Hyalgan) in the treatment of patients with osteoarthritis of the knee: a randomized clinical trial. Hyalgan Study Group;Altman;J Rheumatol,1998
5. Glucosamine, chondroitin sulfate, and the two in combination for painful knee osteoarthritis;Clegg;N Engl J Med,2006