1. Otorhinolaryngology – Head and Neck Surgery Department, Complexo Hospitalario Universitario A Coruña, Galicia, Spain
2. Clinical Research in Medicine, International Center for Doctorate and Advanced Studies, Universidade de Santiago de Compostela, Galicia, Spain
3. Young-Otolaryngologists of the International Federations of Oto-Rhino-Laryngological Societies Study Group, Paris, France
4. Otorhinolaryngology – Head and Neck Surgery Department, Hospital Universitario Donostia, Gipuzkoa, Spain
5. Anatomy and Cell Biology Department, Faculty of Medicine, Research Institute for Health Sciences and Technology, University of Mons, Belgium
6. Otorhinolaryngology Department, Elsan Hospital, Paris, France
7. Department of Medical and Surgical Sciences and Advanced Technologies “GF Ingrassia,” ENT Section, University of Catania, Italy
8. Department of Head and Neck Surgery & Oncology, The Netherlands Cancer Institute Amsterdam, Netherlands
9. Department of Oral and Maxillofacial Surgery, Amsterdam University Medical Center, Netherlands