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 Oto‐Rhino‐Laryngology, Head and Neck Surgery Karolinska University Hospital Stockholm Sweden
3. Theme Cancer, HHLH Karolinska University Hospital Stockholm Sweden
4. Department of Oncology and Radiation Physics Skåne University Hospital, Lund University Lund Sweden
5. Department of Surgical Sciences, Section of Otorhinolaryngology and Head and Neck Surgery Uppsala University Uppsala Sweden
6. Department of Oncology Örebro University Hospital and Örebro University Örebro Sweden
7. Department of Otorhinolaryngology, Anaesthetics, Operations and Specialty Surgery Center, Department of Biomedical and Clinical Sciences Linköping Sweden
8. Department of Clinical Sciences/ENT Umeå University Umeå Sweden
9. Regional Cancer Center Western Sweden Sahlgrenska University Hospital Gothenburg Sweden
10. Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg Sahlgrenska University Hospital Gothenburg Sweden