Accepted for Publication: June 9, 2013.
Published Online: September 18, 2013. doi:10.1001/jamadermatol.2013.6101.
Acquisition of data: Eilers, Guevara.
Analysis and interpretation of data: Eilers, Bach, Gaber, Blatt, Nitsche, Kundu.
Drafting of the manuscript: Eilers, Bach, Robinson.
Critical revision of the manuscript for important intellectual content: Eilers, Bach, Gaber, Blatt, Guevara, Nitsche, Kundu.
Statistical analysis: Bach.
Administrative, technical, or material support: Eilers, Gaber, Blatt, Guevara, Nitsche.
Study supervision: Kundu, Robinson.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported in part by resources provided by the Northwestern University Skin Disease Research Center (P30AR057216), with support from the National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases.
Role of the Sponsor: The funding organizations had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Disclaimer: Dr Robinson, who is the Editor of JAMA Dermatology, was not involved in the editorial evaluation or editorial decision to accept this work for publication. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the view of the Northwestern University Skin Disease Research Center or the National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases.
Additional Contributions: Sancy A. Leachman, MD, PhD, provided the spectrophotometer used in this study. Alfred W. Rademaker, PhD, provided assistance with review of the statistical analysis.