BTG3 and autoimmune disease: In conclusion, this cohort study to date describes the correlation between levels of autoantibodies, viral antibodies, and arthritis outcomes, suggesting that autoantibodies, such as rheumatoid factor, anti-CCP, anti-CEP-1, anti-Sa and ANA, known to play an important role in other autoimmune diseases, do not correlate with chikungunya arthritis relapse disease severity and are unlikely to contribute significantly to arthritis pathogenesis.