Comparing methotrexate monotherapy with methotrexate plus leflunomide combination therapy in psoriatic arthritis: protocol of a randomized, placebo-controlled, double-blind clinica... by Michelle L. M. Mulder, Johanna E. Vriezekolk, Nathan den Broeder, Elien A. M. Mahler, Philip S. Helliwell, Frank H. J. van den Hoogen, Alfons A. den Broeder, Mark H. Wenink

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Dose reduction and withdrawal strategy for TNF-inhibitors in psoriatic arthritis and axial spondyloarthritis: design of a pragmatic open-label, randomised, non-inferiority trial by Celia A. J. Michielsens, Nadine Boers, Nathan den Broeder, Mark H. Wenink, Aatke van der Maas, Elien A. M. Mahler, Michelle L. M. Mulder, Désirée van der Heijde, Frank H. J. van den Hoogen, Lise M. Verhoef, Alfons A. den Broeder

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