Infliximab (chimeric anti-tumour necrosis factor alpha monoclonal antibody) versus placebo in rheumatoid arthritis patients receiving concomitant methotrexate: a randomised phase I... by Maini, R, St Clair, E, Breedveld, F, Furst, D, Kalden, J, Weisman, M, Smolen, J, Emery, P, Harriman, G, Feldmann, M, Lipsky, P