1. Cancer Institute of São Paulo State, Department of Head and Neck Surgery, University of São Paulo Medical School, Sao Paulo 01246-903, Brazil
2. Head and Neck Service, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
3. Department of Otolaryngology Head and Neck Surgery, Harvard Medical School, Boston, MA 02115, USA
4. Department of Otolaryngology and Head and Neck Surgery, University of Oklahoma College of Medicine, Oklahoma City, OK 73104, USA
5. Multidisciplinary Thyroid and Parathyroid Center, Head and Neck Endocrine Surgery, Sarasota Memorial Health Care System, Sarasota, FL 34239, USA
6. Department of Head & Neck Surgery, MD Anderson Cancer Center, Houston, TX 77030, USA
7. Department of Surgery, Gustave Roussy, 94800 Villejuif, France
8. Department of Otolaryngology Head and Neck Surgery, NHS Lothian, University of Edinburgh, Edinburgh EH8 9YL, UK
9. Department of Otorhinolaryngology-Head and Neck Surgery, Jena University Hospital, 07747 Jena, Germany
10. Otorhinolaryngology, Head and Neck Surgery, University Hospitals Leuven, 3000 Leuven, Belgium
11. ENT and Head and Neck Department, Hospital Universitario Central de Asturias, University of Oviedo, ISPA, IUOPA, 33011 Oviedo, Spain
12. Centro de Investigación Biomédica en Red de Cancer (CIBERONC), 28029 Madrid, Spain
13. Assuta Medical Center, Ben-Gurion University of the Negev, Tel Aviv 8436322, Israel
14. Section of Endocrine Surgery, Division of Surgical Oncology, Department of Surgery, Mount Sinai Hospital, Icahn School of Medicine, New York, NY 10029, USA
15. Head and Neck Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA
16. School of Medicine, University of Udine, 33100 Udine, Italy
17. Department of Otorhinolaryngology-Head and Neck Surgery, Helsinki University Hospital, University of Helsinki, 00290 Helsinki, Finland
18. Department of Surgery, University of Arizona College of Medicine, Phoenix, AZ 85724, USA
19. Department of Surgery, School of Medicine, University of Antioquia, Medellín 0500100, Colombia
20. Department of Head and Neck Surgery and Otorhinolaryngology, AC Camargo Cancer Center, Sao Paulo 01509-001, Brazil
21. Department of Head and Neck Surgery, University of Sao Paulo Medical School, Sao Paulo 01246-903, Brazil
22. Coordinator of the International Head and Neck Scientific Group, 35125 Padua, Italy