- SIR – Società Italiana di Reumatologia
http://www.reumatologia.it/cms.asp?ID=35
- Recommendations for the medical management of osteoarthritis of the hip and knee
http://www.rheumatology.org/
- Guideline of the management of pain in osteoarthritis, rheumatoid arthritis and juvenile chronic arthritis
http://www.ampainsoc.org/pub/arthritis.htm