1. Department of Otolaryngology-Head and Neck Surgery; Uludag University School of Medicine; Bursa Turkey
2. Department of Otorhinolaryngology; The University of Oklahoma Health Sciences Center; Oklahoma City Oklahoma
3. Division of Otolaryngology-Head and Neck Surgery; Southern Illinois University School of Medicine; Springfield Illinois
4. Departments of Surgery and Otolaryngology-Head and Neck Surgery; Albert Einstein College of Medicine, Montefiore Medical Center; Bronx New York
5. Department of Radiation Oncology; Institute of Oncology; Ljubljana Slovenia
6. Department of Otolaryngology-Head and Neck Surgery; University of Marburg; Marburg Germany
7. Department of Otolaryngology-Head and Neck Surgery; Guthrie Health System; Sayre Pennsylvania
8. Department of Otolaryngology; Hospital Universitario Central de Asturias; Oviedo Spain
9. Instituto Universitario de Oncología del Principado de Asturias; Oviedo Spain
10. Department of Otorhinolaryngology-Head and Neck Surgery; Kantonsspital; St. Gallen Switzerland
11. Head and Neck Service; Memorial Sloan-Kettering Cancer Center; New York New York
12. Department of Otolaryngology-Head and Neck Surgery; Institut Gustave Roussy; Villejuif Cedex France
13. Laboratoire de Phonétique et de Phonologie; Sorbonne Nouvelle; Paris France
14. Department of Otolaryngology-Head and Neck Surgery; VU University Medical Center; Amsterdam The Netherlands
15. Department of Otolaryngology-Head and Neck Surgery; Radboud University Medical Center; Nijmegen The Netherlands
16. Department of Head and Neck Surgery; Head and Neck Oncology Program; St Luc University Hospital and Cancer Center; Brussels Belgium
17. Department of Surgery; Banner MD Anderson Cancer Center; Gilbert Arizona
18. ENT Clinic; University of Udine; Udine Italy