Lack of pharmacokinetic interaction between rofecoxib and methotrexate in rheumatoid arthritis patients. - Schwartz JI; Agrawal NG; Wong PH; Bachmann KA; Porras AG; Miller JL; Ebel DL; Sack MR; Holmes GB; Redfern JS; Gertz BJ (Journal of clinical pharmacology, 2001)