Accepted for Publication: July 9, 2013.
Published Online: September 18, 2013. doi:10.1001/jamadermatol.2013.6678.
Study concept and design: Both authors.
Acquisition of data: Thomsen.
Analysis and interpretation of data: Both authors.
Drafting of the manuscript: Sand.
Critical revision of the manuscript for important intellectual content: Both authors.
Statistical analysis: Thomsen.
Study supervision: Thomsen.
Conflict of Interest Disclosures: None reported.
Additional Contributions: We are indebted to Nis Kentorp, clinical photographer, for producing the illustrations. Mr Kentorp received no financial remuneration for his contribution.