Erratum to: Optimizing adalimumab treatment in psoriasis with concomitant methotrexate (OPTIMAP): study protocol for a pragmatic, single-blinded, investigator-initiated randomized controlled trial

Affiliations

• ¹ Department of Dermatology, Academic Medical Center, Amsterdam, The Netherlands. c.i.busard@amc.uva.nl.
• ² Department of Dermatology, Academic Medical Center, Amsterdam, The Netherlands.
• ³ Department of Dermatology, Erasmus University Medical Center, Rotterdam, The Netherlands.
• ⁴ Department of Dermatology, Radboud University Medical Center, Nijmegen, The Netherlands.
• ⁵ Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Center, Amsterdam, The Netherlands.