1. Osteoarthritis: A disease of the joint as an organ
2. Salaffi F, De Angelis R, Grassi W. Prevalence of musculoskeletal conditions in an Italian population sample: results of a regional community-based study. I. The MAPPING study. Clin Exp Rheumatol 2005;23:819-828.
3. Prevalence of symptomatic hip and knee osteoarthritis: a two-phase population-based survey1
4. Andrianakos AA, Kontelis LK, Karamitsos DG, Aslanidis SI, Georgountzos AI, Kaziolas GO, Pantelidou KV, Vafiadou EV, Dantis PC. Prevalence of symptomatic knee, hand, and hip osteoarthritis in Greece. The ESORDIG study. J Rheumatol 2006;33:2507-2513.
5. The prevalence of knee osteoarthritis in the elderly. the framingham osteoarthritis study