1. Department of Otorhinolaryngology - Head and Neck Surgery; Helsinki University Hospital and University of Helsinki; Helsinki Finland
2. Department of Vascular Surgery; Helsinki University Hospital and University of Helsinki; Helsinki Finland
3. Department of Head and Neck Surgical Oncology, University Medical Center Utrecht Cancer Center; University Medical Center Utrecht; Utrecht The Netherlands
4. Department of Vascular Surgery; Hospital Universitario de Cabueñes; Gijón Spain
5. Department Otorhinolaryngology - Head and Neck Surgery, Centro de Tratamento e Pesquisa; Hospital do Cancer A.C. Camargo; São Paulo Brazil
6. Department of Surgery and Otolaryngology, Head and Neck Surgery; Edinburgh University; Edinburgh Scotland
7. University of Udine School of Medicine; Udine Italy
8. Department of Otolaryngology, Hospital Universitario Central de Asturias; University of Oviedo, IUOPA, ISPA, CIBERONC; Oviedo Spain
9. Division of Otolaryngology - Head and Neck Surgery; Southern Illinois University School of Medicine; Springfield Illinois
10. Department of Surgery; University of Arizona College of Medicine; Phoenix Arizona
11. Department of Otolaryngology; University of Pittsburgh School of Medicine; Pittsburgh Pennsylvania
12. Instituto de Investigación Sanitaria del Principado de Asturias and CIBERONC, ISCIII; Oviedo Spain
13. Instituto Universitario de Oncología del Principado de Asturias; University of Oviedo; Oviedo Spain
14. Department of Otolaryngology - Head and Neck Surgery; Radboud University Medical Center; Nijmegen The Netherlands
15. Coordinator of the International Head and Neck Scientific Group