1. Research Unit for ORL – Head & Neck Surgery and Audiology, Odense University Hospital, Odense, Denmark
2. Faculty of Health Sciences, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
3. Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
4. Center for Translational Cardiology and Pragmatic Randomized Trials, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
5. Department of Oncology, The Norwegian Radium Hospital, Oslo University Hospital, Nydalen, Oslo, Norway
6. Department of Otorhinolaryngology – Head and Neck Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
7. Research Program in Systems Oncology, Faculty of Medicine, University of Helsinki, Helsinki, Finland
8. Division of Ear, Nose and Throat Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institute and Karolinska University Hospital, Stockholm, Sweden
9. Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, Rigshospitalet Copenhagen University Hospital, Copenhagen, Denmark
10. Department of Ear, Nose and Throat, Head and Neck Surgery, St. Olav’s Hospital, Trondheim University Hospital, Trondheim, Norway
11. Department of Oncology, Tampere University Hospital, Tampere, Finland
12. Department of Hematology, Oncology, and Radiation Physics, Skåne University Hospital, Lund University, Lund, Sweden