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I can answer questions regarding osteoarthritis and rheumatoid arthritis. I can also answer questions regarding other autoimmune diseases of which rheumatoid arthritis is an autoimmune disease.
I have a family history of rheumatoid arthritis and I myself suffer from osteoarthritis. I also suffer from systemic sclerosis and CREST syndrome which are also autoimmune disease (rheumatoid arthritis is an autoimmune disease.)