1. Department of Otorhinolaryngology‐Head and Neck Surgery, Institute of Clinical Sciences Sahlgrenska Academy at University of Gothenburg, Sahlgrenska University Hospital Gothenburg Sweden
2. Department of Oncology and Pathology Cancer Center Karolinska, Karolinska Hospital Stockholm Sweden
3. Department of Oncology and Radiation Physics Skåne University Hospital, Lund University Lund Sweden
4. Department of Surgical Sciences Section of Otorhinolaryngology and Head & Neck Surgery, Uppsala University Uppsala Sweden
5. Department of Oncology Örebro University Hospital and Örebro University Sweden
6. Division of Otorhinolaryngology, Department of Clinical and Experimental Medicine, Faculty of Health Sciences Linköping University Linköping Sweden
7. Department of Clinical Sciences/ENT Umeå University Umeå Sweden
8. Regional Cancer Center Western Sweden Sahlgrenska University Hospital Gothenburg Sweden
9. Department of Oncology Institute of Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg, Sahlgrenska University Hospital Gothenburg Sweden