R. N. Maini, F. C. Breedveld, J. R. Kalden, J. S. Smolen, D. Davis, J. D. MacFarlane, C. Antoni, B. Leeb, M. J. Elliott, J. N. Woody, T. F. Schaible, and M. Feldmann, Therapeutic efficacy of multiple intravenous infusions of anti-tumor necrosis factor a monoclonal antibody combined with low-dose weekly methotrexate in rheumatoid arthritis,[ Arthritis Rheumatism, vol. 41, no. 9,pp. 1552–1563, 1998.