Treatment of active rheumatoid arthritis with leflunomide: two year follow up of a double blind, placebo controlled trial versus sulfasalazine
D L Scott, J S Smolen, J R Kalden, L B A van de Putte, A Larsen, T K Kvien, M Schattenkirchner, P Nash, C Oed, I Loew-Friedrich
Annals of the Rheumatic Diseases Oct 2001, 60 (10) 913-923; DOI: 10.1136/ard.60.10.913
