Merging Veterans Affairs rheumatoid arthritis registry and pharmacy data to assess methotrexate adherence and disease activity in clinical practice

Grant W. Cannon, Ted R. Mikuls, Candace L. Hayden, Jian Ying, Jeffrey R. Curtis, Andreas M. Reimold, Liron Caplan, Gail S. Kerr, J. Steuart Richards, Dannette S. Johnson, Brian C. Sauer