Accepted for Publication: July 7, 2011.
Author Contributions: Drs Navarini and Tr üeb had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Tr üeb. Acquisition of data: Prinz-Vavricka and Tr üeb. Analysis and interpretation of data: Navarini, Kolios, Prinz-Vavricka, Haug, and Tr üeb. Drafting of the manuscript: Navarini, Kolios, Prinz-Vavricka, and Tr üeb. Critical revision of the manuscript for important intellectual content: Navarini, Kolios, Prinz-Vavricka, Haug, and Tr üeb. Statistical analysis: Navarini. Administrative, technical, and material support: Navarini, Kolios, Prinz-Vavricka, Haug, and Tr üeb. Study supervision: Prinz-Vavricka, and Tr üeb.
Financial Disclosure: None reported.
Funding/Support: This study was supported by the Department of Dermatology, University Hospital of Z ürich.
Previous Presentation: Preliminary results of this study were presented at the 12th Meeting of the European Hair Research Society; June 29 through July 1, 2006; London, England.
Additional Information: Drs Navarini, Kolios, and Prinz-Vavricka contributed equally to this work.