Franziska Falk

Efficacy and safety of leflunomide in the treatment of psoriatic arthritis and psoriasis: a multinational, double-blind, randomized, placebo-controlled clinical trial.

D. Gladman, P. Mease, P. Nash, 2004, Arthritis and rheumatism.

Leflunomide Improves Psoriasis in Patients with Psoriatic Arthritis: An In-Depth Analysis of Data from the TOPAS Study

P. Nash, D. Thaçi, F. Behrens, 2006, Dermatology.