1. Department of Otorhinolaryngology‐Head and Neck Surgery Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
2. Department of Otorhinolaryngology‐Head and Neck Surgery Sahlgrenska University Hospital Gothenburg Sweden
3. Department of Otorhinolaryngology, Head and Neck Surgery NU‐Hospital Group Trollhättan Sweden
4. Department of Otorhinolaryngology Head and Neck Surgery, Skas Skövde Sweden
5. Department of Oncology Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
6. Department of Oncology Sahlgrenska University Hospital Gothenburg Sweden
7. Department of Internal Medicine and Clinical Nutrition, Sahlgrenska Academy University of Gothenburg, Sahlgrenska University Hospital Gothenburg Sweden