http://articles.mercola.com/sites/articles/archive/2002/02/13/rheumatoid-arthritis-part-four.aspxA small study involving twins suggests that a person's genes play only a minor role in whether or not they will develop rheumatoid arthritis -- an autoimmune disease in which the body's tissues are mistakenly attacked by its own immune system. The potentiallyenCommunityServer 2008.5 SP1 (Build: 31106.3070)