1. Department of Oncology-Pathology, Karolinska Institutet, Bioclinicum J6:20, Karolinska University Hospital, 171 64 Stockholm, Sweden
2. Department of Clinical Pathology, CCK R8:02, Karolinska University Hospital, 171 64 Stockholm, Sweden
3. Medical Unit Head Neck Lung and Skin Cancer, Department of Head and Neck Surgery, Karolinska University Hospital, 171 64 Stockholm, Sweden
4. Department of Clinical Science, Intervention and Technology—CLINTEC Division of Ear, Nose and Throat Diseases, Karolinska Institutet, University Hospital, 171 64 Stockholm, Sweden
5. Department of Surgical Sciences, Section of Otolaryngology and Head and Neck Surgery, Uppsala University, 751 05 Uppsala, Sweden