1. Department of OtorhinolaryngologyHillerød HospitalHillerød Denmark
2. Department of Otorhinolaryngology, Head and Neck Surgery and AudiologyRigshospitalet and Gentofte Hospital, University of CopenhagenCopenhagen Denmark
3. Department of OncologyHerlev Hospital Denmark
4. Department of Otorhinolaryngology, Head and Neck Surgery and AudiologyRigshospitalet, University of CopenhagenCopenhagen East Denmark