Submitted for Publication: August 4, 2011; final revision received September 29, 2011; accepted November 9, 2011.
Author Contributions: Drs Mendels and Brunings contributed equally to this study. Dr Brunings is independent of any commercial funder, 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: Mendels, Brunings, Hamaekers, and Stokroos. Acquisition of data: Mendels, Brunings, and Baijens. Analysis and interpretation of data: Mendels, Brunings, Hamaekers, Stokroos, Kremer, and Baijens. Drafting of the manuscript: Mendels, Brunings, Stokroos, and Baijens. Critical revision of the manuscript for important intellectual content: Mendels, Brunings, Hamaekers, Stokroos, Kremer, and Baijens. Statistical analysis: Mendels and Brunings. Administrative, technical, and material support: Mendels and Brunings. Study supervision: Brunings, Hamaekers, Stokroos, Kremer, and Baijens.
Financial Disclosure: Dr Hamaekers is lead investigator of a research project that is generously supported by a European grant (OP-Zuid 31R104). She is a member of the medical advisory board of Ambu and has received free samples of airway equipment for teaching and clinical evaluation from several companies. She has no financial interest in any company.
Previous Presentation: This study was presented at the 218th Ear, Nose, and Throat meeting of the Dutch Society for Otorhinolaryngology and Cervicofacial Surgery; April 7, 2011; Nieuwegein, the Netherlands.