1. Department of Otolaryngology and Head and Neck Surgery The University of Oklahoma College of Medicine Oklahoma City Oklahoma USA
2. Division of Thyroid and Parathyroid Endocrine Surgery, Department of Otolaryngology Massachusetts Eye and Ear Infirmary Boston Massachusetts USA
3. Department of Surgery and MacLean Center for Clinical Medical Ethics The University of Chicago Chicago Illinois USA
4. Head and Neck Endocrine Surgery The University of Texas M. D. Anderson Cancer Center Houston Texas USA
5. Division of Head and Neck Endocrine Surgery, Department of Otolaryngology‐Head and Neck Surgery Johns Hopkins Baltimore Maryland USA
6. Department of Head and Neck Surgery University of Sao Paulo Medical School São Paulo Brazil
7. Head and Neck Surgery and Otorhinolaryngology Department A. C. Camargo Cancer Center São Paulo Brazil
8. Division of Surgical Oncology, Department of Surgery Mount Sinai School of Medicine New York New York USA
9. Head and Neck Surgery and Oncology Unit, A.R.M. Center for Advanced Otolaryngology Head and Neck Surgery Assuta Medical Center Tel Aviv Israel
10. Instituto de Investigación Sanitaria del Principado de Asturias, IUOPA, CIBERONC Oviedo Spain
11. Head and Neck Service Memorial Sloan Kettering Cancer Center New York New York USA
12. University of Oviedo, Hospital Universitario Central de Asturias Oviedo Spain
13. University of Udine School of Medicine Udine Italy
14. Department of Surgery University of Arizona College of Medicine Phoenix Arizona USA
15. International Head and Neck Scientific Group Padua Italy