Sustained efficacy along with improvements in disease activity score 28 (DAS 28) and patient (Pt)-reported outcomes (PROs) with abatacept (Aba) in rheumatoid arthritis (RA) pts with an inadequate response to anti-tumor necrosis factor (TNF) therapy: The long-term extension (LTE) of the attain trial
RHEUMATOLOGY（2007）
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