1. Department of Otolaryngology/Head and Neck Surgery, Haukeland University Hospital, Bergen, Norway;
2. Department of Clinical Medicine, Faculty of Medicine, University of Bergen, Bergen, Norway;
3. Faculty of Health and Social Sciences, Western Norway University of Applied sciences, Bergen, Norway;
4. Department of Clinical Science, Section of Logopedics, Phoniatrics and Audiology, Lund University, Lund, Sweden;
5. Department of Oncology, Regional Centre for Excellence in Palliative Care, Oslo University Hospital, Oslo, Norway;
6. Department of Cancer Research and Molecular Medicine, Faculty of Medicine, European Palliative Care Research Centre, NTNU, Trondheim, Norway;
7. Faculty of Health, VID Specialized University, Bergen, Norway