Accepted for Publication: December 12, 2012.
Author Contributions: All authors had full access to all of the data in the study and take the responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Massone, Wolf, Soyer, and Hofmann-Wellenhof.
Acquisition of data: Wolf, Gringschl, and Hofmann-Wellenhof.
Analysis and interpretation of data: Massone, Wolf, Gringschl, and Soyer.
Drafting of the manuscript: Massone.
Critical revision of the manuscript for important intellectual content: Wolf, Soyer, and Hofmann-Wellenhof.
Statistical analysis: Wolf and Hofmann-Wellenhof.
Administrative, technical, and material support: Massone, Wolf, Gringschl, and Soyer.
Study supervision: Wolf, Soyer, and Hofmann-Wellenhof.
Published Online: May 8, 2013. doi:10.1001/jamadermatol.2013.420.
Conflict of Interest Disclosures: None reported.
Funding/Support: This project was supported by an unrestricted research grant from Beiersdorf AG, Hamburg, Germany.
Additional Contributions: We thank Volker Wendel and Heiner Gers-Barlag, Beiersdorf AG, Hamburg, Germany, for their help and support in determining the emission spectra of the solar simulator radiation equipment.