1. Department of Otorhinolaryngology, Head & Neck Surgery, Aarhus University Hospital, Aarhus, Denmark;
2. Department of Otorhinolaryngology, Head & Neck Surgery, Aalborg University Hospital, Aalborg, Denmark;
3. Department of Clinical Medicine, Aarhus University, Aarhus, Denmark;
4. Department of Otorhinolaryngology, Head & Neck Surgery, Region Hospital Holstebro, Holstebro, Denmark