Accepted for Publication: July 21, 2013.
Published Online: February 5, 2014. doi:10.1001/jamadermatol.2013.7016.
Study concept and design: All authors.
Acquisition of data: Kiiski, Kari.
Analysis and interpretation of data: Kiiski, Remitz, Reitamo, Kari.
Drafting of the manuscript: All authors.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Kiiski.
Obtained funding: Remitz, Reitamo.
Administrative, technical, or material support: Kari.
Study supervision: Remitz, Reitamo, Kari.
Conflict of Interest Disclosures: Dr Reitamo reported serving as a consultant for Astellas Pharma. No other disclosures were reported.
Funding/Support: This study was supported in part by a grant from The Finnish Dermatological Society (Dr Kiiski).
Role of the Sponsor: The funding source had no role in the design and conduct of the study; collection, management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.