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Distribution of disease activity by Week 52 DAS28(ESR) and rheumatoid factor in patients who were treated with CZP + MTX in Year 1 and entered the post‐treatment period (CZP + MTX→MTX; N = 108). CZP, certolizumab pegol; DAS28(ESR), disease activity score 28(erythrocyte sedimentation rate); MTX, methotrexate; RF, rheumatoid factor; SDAI, Simple Disease Activity Index
