Previous Product Next Product Rheumatoid Factor $40.00 Helps diagnose rheumatoid arthritis and investigate symptoms related to autoimmune disorders. Rheumatoid Factor quantity Add to cart Category: Individual Testing Related products Quick View Quick View Individual TestingHLA-B27 Antigen $169.00 Add to cart Quick View Quick View Individual TestingFree Thyroxine (Free T4) $39.00 Add to cart Quick View Quick View Individual TestingCoenzyme Q10 $109.00 Add to cart