Affiliation: | 1. Department of Otorhinolaryngology, Head and Neck Surgery, Kantonsspital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland 2. Institute of Surgical Pathology, University Hospital of Zurich, Zurich, Switzerland 3. Clinical Trials Unit, Kantonsspital St. Gallen, St. Gallen, Switzerland 4. Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital of Zurich, Zurich, Switzerland
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