Submitted for Publication: April 9. 2012; final revision received June 11, 2012; accepted June 18, 2012.
Published Online: August 20, 2012. doi:10.1001/archoto.2012.1618
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: Koch, Iro, and Zenk. Acquisition of data: Koch, Klintworth, Psychogios, and Zenk. Analysis and interpretation of data: Koch and Zenk. Drafting of the manuscript: Koch. Critical revision of the manuscript for important intellectual content: Koch, Iro, Klintworth, Psychogios, and Zenk. Statistical analysis: Klintworth and Psychogios. Administrative, technical, and material support: Koch. Study supervision: Iro and Zenk.
Financial Disclosure: None reported.
Previous Presentations: All parts of this study were presented orally and were available in abstract form in the congress brochure at the Second International Congress on Salivary Gland Diseases, University of Pittsburgh; October 18-22, 2007; Pittsburgh, Pennsylvania; the German Otorhinolaryngology Congress; May 17-20, 2007; Munich, Germany; and the Collegium Oto-Rhino-Laryngologicum Amicitiae Sacrum (CORLAS); August 22-25, 2010; University of Budapest, Budapest, Hungary.