title: Erratum to: Optimizing adalimumab treatment in psoriasis with concomitant methotrexate (OPTIMAP): study protocol for a pragmatic, single-blinded, investigator-initiated randomized controlled trial.
authors.affiliation: Department of Dermatology, Academic Medical Center, Amsterdam, The Netherlands. c.i.busard@amc.uva.nl.
authors.forename: Celine
authors.initials: C
authors.lastname: Busard
authors.affiliation: Department of Dermatology, Academic Medical Center, Amsterdam, The Netherlands.
authors.forename: Stef
authors.initials: S
authors.lastname: Menting
authors.affiliation: Department of Dermatology, Erasmus University Medical Center, Rotterdam, The Netherlands.
authors.forename: Sun-Jine
authors.initials: SJ
authors.lastname: van Bezooijen
authors.affiliation: Department of Dermatology, Radboud University Medical Center, Nijmegen, The Netherlands.
authors.forename: Juul
authors.initials: J
authors.lastname: van den Reek
authors.affiliation: Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Center, Amsterdam, The Netherlands.
authors.forename: Barbara
authors.initials: B
authors.lastname: Hutten
authors.affiliation: Department of Dermatology, Erasmus University Medical Center, Rotterdam, The Netherlands.
authors.forename: Errol
authors.initials: E
authors.lastname: Prens
authors.affiliation: Department of Dermatology, Radboud University Medical Center, Nijmegen, The Netherlands.
authors.forename: Elke
authors.initials: E
authors.lastname: de Jong
authors.affiliation: Department of Dermatology, Erasmus University Medical Center, Rotterdam, The Netherlands.
authors.forename: Martijn
authors.initials: M
authors.lastname: van Doorn
authors.affiliation: Department of Dermatology, Academic Medical Center, Amsterdam, The Netherlands.
authors.forename: Phyllis
authors.initials: P
authors.lastname: Spuls