Accepted for Publication: December 20, 2011.
Published Online: March 19, 2012. doi:10.1001/archsurg.2012.150
Authors Contributions:Study concept and design: Ortiz and Valero. Acquisition of data: Kreisler, Garcia-Granero, Espin-Basany, Roig, Martín, Parajo, Valero, Martínez, and Biondo. Analysis and interpretation of data: Ortiz, Armendariz, Kreisler, Garcia-Granero, Roig, Martín, Parajo, Martínez, and Biondo. Drafting of the manuscript: Ortiz, Armendariz, and Kreisler. Critical revision of the manuscript for important intellectual content: Kreisler, Garcia-Granero, Espin-Basany, Roig, Martín, Parajo, Valero, Martínez, and Biondo. Obtained funding: Ortiz. Administrative, technical, and material support: Armendariz and Valero. Study supervision: Ortiz.
Financial Disclosures: None reported.
Funding/Support: This project was supported by grant FIS PI0805/90196 from the Spanish Ministry of Health.
Previous Presentation: This study was presented as 6 oral presentations at the European Society of Coloproctology 6th Scientific and Annual Meeting; September 22, 2011; Copenhagen, Denmark.