Accepted for Publication: September 7, 2013.
Published Online: December 18, 2013. doi:10.1001/jamadermatol.2013.8347.
Study concept and design: Menting, Spuls, Lecluse.
Acquisition of data: Menting, van Lümig, de Vries, van den Reek van der Kleij, de Jong, Lecluse.
Analysis and interpretation of data: Menting, van der Kleij, Spuls, Lecluse.
Drafting of the manuscript: Menting, Spuls, Lecluse.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Menting, Spuls, Lecluse.
Administrative, technical, or material support: Menting, de Vries, van den Reek, van der Kleij, de Jong, Lecluse.
Study supervision: van der Kleij, Spuls, Lecluse.
Conflict of Interest Disclosures: Dr Menting reports carrying out clinical trials for Abbvie, Amgen, and Pfizer. Dr van Lümig reports carrying out clinical trials for Abbott and Janssen-Cilag, receiving speaking and consulting fees from Wyeth and Schering-Plough, and receiving reimbursement for attending conferences from Schering-Plough, Pfizer, and Janssen. Dr van den Reek reports carrying out clinical trials for AbbVie and Janssen, receiving speaking fees from AbbVie, and receiving reimbursement for attending a symposium from Janssen and AbbVie. Dr de Jong reports receiving research grants for the independent research fund of the Department of Dermatology, University Medical Centre St Radboud Nijmegen, the Netherlands, from Merck-Serono, Wyeth, Abbott, Pfizer, and Janssen; she also reports acting as a consultant and/or paid speaker for and/or participating in research sponsored by companies that manufacture drugs used for the treatment of psoriasis, including Abbott, Janssen, Merck Sharp & Dohme, and Pfizer. Dr Spuls reports having been an invited speaker for the European Academy of Dermatology and Venerology preceptorship meeting in 2009, which was sponsored by Abbott, and twice for the yearly national Abbott dermatology days; she also reports receiving an honorarium from Abbott through a grant to the University of Kiel for membership on the Progressive Psoriasis Initiative steering committee in 2010 and 2011 and attendance of a meeting in 2012. The Department of Dermatology, Academic Medical Center, Amsterdam, with Dr Spuls as principal investigator, performs studies together with many pharmaceutical companies, such as Janssen, Centocor, Schering-Plough, Pfizer, Amgen, Celgene, and Abbott. Dr Lecluse reports receiving a fee from Abbvie for organizing training days for residents. No other disclosures were reported.
Additional Contributions: We thank research nurses H. M. Bonnerjee-van der Stok and M. E. Otero for coordinating patient visits and assisting with data collection. These individuals were not compensated for their assistance.