Accepted for Publication: June 27, 2013.
Published Online: October 16, 2013. doi:10.1001/jamadermatol.2013.6448.
Study concept and design: Kenner-Bell, Paller.
Acquisition of data: Shah, Boen, Schwartz, Paller.
Analysis and interpretation of data: Shah, Boen, Rademaker, Paller.
Drafting of the manuscript: Shah, Boen, Schwartz, Paller.
Critical revision of the manuscript for important intellectual content: Shah, Boen, Kenner-Bell, Rademaker, Paller.
Statistical analysis: Shah, Boen, Rademaker, Paller.
Administrative, technical, and material support: Boen, Paller.
Study supervision: Boen, Paller.
Conflict of Interest Disclosures: Dr Paller is a member of the International Pachyonychia Congenita Consortium without financial compensation. No other disclosures were reported.
Funding/Support: The genotyping for the IPCRR is conducted under grant 315.811099 from the Pachyonychia Congenita Project to the University of Dundee McLean/Smith laboratory.
Role of the Sponsor: The funders had no role in the design and conduct of the study; in the analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript. The Pachyonychia Congenita Project assisted in the collection of data for the manuscript.
Additional Contributions: Genotyping was performed in the laboratory of W. H. Irwin McLean, DSc, FRSE, and Frances J. D. Smith, PhD, University of Dundee, Scotland.