http://articles.mercola.com/sites/articles/archive/2002/04/27/rheumatoid-arthritis-part-seven.aspxRA is a chronic disease marked by inflammation in the joints that causes pain, swelling and loss of mobility. It is an autoimmune disease, meaning it arises from an abnormal immune system attack on the body's own tissue. Researchers from the Mayo ClinicenCommunityServer 2008.5 SP1 (Build: 31106.3070)