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*<b>[http://www.kidney.de/mlpefetch.php?search=11890654 "Stepping-up" from methotrexate: a systematic review of randomised placebo controlled trials in patients with rheumatoid arthritis with an incomplete response to methotrexate ]</b> Ann Rheum Dis 2001; 60 Suppl 3(Suppl 3) ; iii51-4 Hochberg MC; Tracy JK; Flores RH
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