1. Department of Organi di Senso, Sapienza University, 00185 Rome, Italy
2. Department of Biomedical Sciences, Humanitas University, 20072 Milan, Italy
3. Department of Otolaryngology, Kore University, 94100 Enna, Italy
4. Department of Otolaryngology, Elsan Polyclinic of Poitiers, 86000 Poitiers, France
5. Service of Otolaryngology, Rhinology Unit, Hospital Complex of Santiago de Compostela Travesía de Choupana, 15706 Santiago de Compostela, Spain
6. Department of Otorhinolaryngology-Head & Neck Surgery, Alexandria University, Alexandria 5424041, Egypt
7. Integrated Therapies in Otolaryngology, Fondazione Policlinico Universitario Campus Bio-Medico, 00128 Rome, Italy
8. Department of Otorhinolaryngology, Grupo Medico San Pedro, Monterrey 64660, Mexico
9. Department of Otorhinolaryngology, Clínica Universidad de Navarra, 31008 Pamplona, Spain
10. Otorhinolaryngology Unit, San Pio X Hospital, 20159 Milan, Italy
11. IRCCS ‘Casa Sollievo della Sofferenza’, 71013 San Giovanni Rotondo, Italy
12. Otorhinolaryngology Unit, Civil Hospital of Alghero, 07041 Alghero, Italy
13. Head-Neck and Oral Surgery Unit, Department of Head-Neck Surgery, Otolaryngology, Morgagni Pierantoni Hospital, 47121 Forlì, Italy
14. Department ENT & Audiology, University of Ferrara, 44121 Ferrara, Italy