Accepted for Publication: February 14, 2011.
Author Contributions: Dr Korff had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Korff and Siegrist. Acquisition of data: Korff, Parvex, Wilhelm-Bals, Hampe, Schwitzgebel, Michel, and Lalive. Analysis and interpretation of data: Korff, Parvex, Cimasoni, Hampe, Schwitzgebel, Siegrist, Lalive, and Seeck. Drafting of the manuscript: Korff, Cimasoni, and Wilhelm-Bals. Critical revision of the manuscript for important intellectual content: Korff, Parvex, Wilhelm-Bals, Hampe, Schwitzgebel, Michel, Siegrist, Lalive, and Seeck. Administrative, technical, and material support: Parvex, Hampe, Lalive, and Seeck. Study supervision: Korff, Schwitzgebel, and Lalive.
Financial Disclosure: None reported.