1. Department of Otorhinolaryngology, Head and Neck Surgery, Hospital Universitari Bellvitge, Universitat de Barcelona, 08907 Barcelona, Spain
2. Institut d’Investigació Biomèdica de Bellvitge, L’Hospitalet de Llobregat, 08908 Barcelona, Spain
3. Department of Otorhinolaryngology, Head and Neck Surgery, Guy’s and St Thomas’ NHS Foundation Trust, London SE1 9RT, UK
4. Department of Otorhinolaryngology, Head and Neck Surgery, Hospital de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona, 08025 Barcelona, Spain
5. Department of Surgery, Universidad de Antioquia, Hospital Universitario San Vicente Fundación, CEXCA Centro de Excelencia en Enfermedades de Cabeza y Cuello, Medellin 1226, Colombia
6. Department of Otorhinolaryngology, Head and Neck Surgery, Jena University Hospital, 07747 Jena, Germany
7. Department of Head and Neck Surgery, MD Anderson Cancer Center, Houston, TX 77030, USA
8. Thyroid Surgery Unit, Department of Otorhinolaryngology Head and Neck Surgery, Institute Gustave Roussy, 94805 Paris, France
9. Department of Otolaryngology, Hospital Universitario Central de Asturias, University of Oviedo, ISPA, IUOPA, CIBERONC, 33011 Oviedo, Spain
10. Department of Head and Neck Surgery, Memorial Sloan-Kettering Cancer Center, Medical College, Cornell University, New York, NY 10065, USA
11. Department of Otorhinolaryngology Head and Neck Surgery, Institute of Biomedical Research, University Hospital Rouen, 76000 Rouen, France
12. Department of Otorhinolaryngology Head and Neck Surgery, University Hospitals Leuven, 3000 Leuven, Belgium
13. Department of Otorhinolaryngology Head and Neck Surgery, ASST Spedali Civili of Brescha, School of Medicine, University of Brescia, 25123 Brescia, Italy
14. Department of Otorhinolaryngology Head and Neck Surgery, A.C. Camargo Cancer Center, Faculty of Medicine, University of Sao Paulo, São Paulo 03828-000, Brazil
15. Department of Otorhinolaryngology, Division of Thyroid and Parathyroid Endocrine Surgery, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA
16. Department of Surgery, Memorial Sloan-Kettering Cancer Center, Weil Medical College, Cornell University, New York, NY 10065, USA
17. School of Medicine, University of Udine, 33100 Udine, Italy
18. King’s College London, London SE5 8AF, UK