1. Department Head and Neck Cancer Instituto de Investigación Sanitaria del Principado de Asturias (ISPA) Instituto Universitario de Oncología del Principado de Asturias (IUOPA) Centro de Investigación Biomédica en Red (CIBER‐ONC) Oviedo Spain
2. Department Otolaryngology Hospital Universitario Central de Asturias Oviedo Spain
3. Department Pathology Hospital Universitario Central de Asturias Oviedo Spain
4. Department of Translational Research and of New Technologies in Medicine and Surgery University of Pisa Pisa Italy
5. The Fingerland Dept Pathology Charles University Faculty of Medicine in Hradec Kralove University Hospital Hradec Kralove Hradec Kralove Czech Republic