Maini RN et ai: Infliximb(chimeric anti-tumor factorα monoclonal antibody) versus placebo in rheumatoid arthritis patients receiving concomimitant methotrexate: A randomised phase III trial. Lancet 354: 1932-1939, 1999
Lipsky P et al: RA therapy:Long term observations with new therapies. Arthritis Rheum 43(9S): 2000(ACR abstract session)