Author Contributions: All authors 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. Study concept and design: Frasson and Bertolasi. Acquisition of data: Frasson, Brigo, Acler, and Vicentini. Analysis and interpretation of data: Frasson, Brigo, Acler, and Didonè. Drafting of the manuscript: Frasson, Brigo, Acler, and Vicentini. Critical revision of the manuscript for important intellectual content: Frasson, Didonè, and Bertolasi. Statistical analysis: Didonè. Administrative, technical, and material support: Brigo, Acler, and Vicentini. Study supervision: Frasson and Bertolasi.