1. Department of Otorhinolaryngology—Head & Neck SurgeryHospital Universitario Donostia San Sebastian Spain
2. Department of Human Anatomy & Experimental OncologyUniversity of Mons Mons Belgium
3. Department of Otolaryngology—Head and Neck SurgeryUniversitary Hospital of la Conception Marseille France
4. Department of Otolaryngology—Head and Neck SurgeryHotel Dieu de France Hospital, Saint Joseph University Beirut Lebanon
5. Department of otolaryngology—Hospital Complex of Santiago de Compostela Santiago de Compostela Spain
6. Department of Otorhinolaryngology—Centre d'AudioPhonologie des Cliniques Universitaires Saint Luc Brussels Belgium
7. Division of OtolaryngologyUniversity of Cape Town Cape Town South Africa
8. Division of Otolaryngology—Head & Neck SurgeryCentre Hospitalier de l'Université de Montréal Montreal Québec Canada