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Derivation and preliminary validation of an administrative claims-based algorithm for the effectiveness of medications for rheumatoid arthritis

Jeffrey R Curtis*, John W Baddley, Shuo Yang, Nivedita Patkar, Lang Chen, Elizabeth Delzell, Ted R Mikuls, Kenneth G Saag, Jasvinder Singh, Monika Safford and Grant W Cannon

Arthritis Research & Therapy 2011, 13:R155  doi:10.1186/ar3471