Accepted for Publication: September 24, 2011.
Published Online: January 16, 2012. doi:10.1001 /archsurg.2011.1690
Author Contributions:Study concept and design: Slieker, Komen, Jeekel, and Lange. Acquisition of data: Slieker, Komen, Karsten, Willemsen, and Lange. Analysis and interpretation of data: Slieker, Komen, Mannaerts, Murawska, Jeekel, and Lange. Drafting of the manuscript: Slieker, Jeekel, and Lange. Critical revision of the manuscript for important intellectual content: Slieker, Komen, Mannaerts, Karsten, Willemsen, Murawska, Jeekel, and Lange. Statistical analysis: Slieker, Murawska, and Lange. Obtained funding: Jeekel and Lange. Administrative, technical, and material support: Komen, Mannaerts, and Lange. Study supervision: Komen, Mannaerts, Jeekel, and Lange.
Financial Disclosure: None reported.
Funding/Support: This work was supported by a grant from Stichting Technische Wetenschappen, Utrecht, the Netherlands.