Combination therapy of leflunomide (LEF) & methotrexate (MTX) is effective & well tolerated in RA patients inadequately responding to MTX alone Kremer, J. M., Genovese, M., Cannon, G. W., Caldwell, J. R., Cush, J. J., Bathon, J. J RHEUMATOL PUBL CO. 2001: 105–105

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