1 Departments of Otorhinolaryngology Head & Neck Surgery and Audiology.
2 Department of Otorhinolaryngology and Maxillofacial Surgery, Zealand University Hospital, Køge, Denmark.
3 Pathology, Rigshospitalet, Copenhagen University Hospital, Copenhagen.
4 The Fingerland Department of Pathology, Charles University Faculty of Medicine and University Hospital Hradec Kralove, Hradec Kralove, Czech Republic.