Accepted for Publication: July 26, 2012.
Author Contributions: Drs Pelivani, Hegyi, and Borradori had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Drs Surovy and Pelivani contributed equally to the study. Study concept and design: Surovy, Pelivani, and Borradori. Acquisition of data: Surovy, Pelivani, and Buettiker. Analysis and interpretation of data: Surovy, Pelivani, Hegyi, Beltraminelli, and Borradori. Drafting of the manuscript: Surovy, Pelivani, Hegyi, Buettiker, and Borradori. Critical revision of the manuscript for important intellectual content: Pelivani, Beltraminelli, and Borradori. Statistical analysis: Surovy. Obtained funding: Surovy. Administrative, technical, and material support: Surovy, Hegyi, and Borradori. Study supervision: Pelivani, Buettiker, Beltraminelli, and Borradori.
Conflict of Interest Disclosures: None reported.
Additional Contributions: M. Fritz Schweizer, CPP, provided photographic work and support.