Efficacy and safety of leflunomide compared with placebo and sulphasalazine in active rheumatoid arthritis: a double-blind, randomised, multicentre trial
Josef S Smolen, Joachim R. Kalden, David L. Scott, Blaž Rozman, Tore K Kvien, A. Larsen, Iris Loew-Friedrich, Christine Oed, Ronald Rosenburg
Abstract