1. Department of Head-Neck Surgery, Otolaryngology, Head-Neck and Oral Surgery Unit, Morgagni Pierantoni Hospital, Forlì, Italy
2. Department of ENT & Audiology, University of Ferrara, Ferrara, Italy
3. Faculty of Medicine, Laboratory of Anatomy and Cell Biology, University of Mons (UMONS), Mons, Belgium
4. Pulmonology Unit, Thoracic Diseases Department, G.B. Morgagni Hospital, Forlì, Italy
5. Department of Respiratory Diseases and Allergy, Aarhus University Hospital, Aarhus, Denmark
6. Medicine Department, G.B. Morgagni Hospital, Forlì, Italy
7. Department of Infectious Diseases, G.B. Morgagni Hospital, Forlì, Italy
8. ENT Unit, “V. Fazzi” Hospital, ASL Lecce, Italy
9. Hospital Rehabilitation Department, Cardio-Respiratory Care Unit, “V. Fazzi”, ASL Lecce, Italy
10. Department of Head-Neck Surgery, Otolaryngology, Head-Neck and Oral Surgery Unit, Ospedale “Santa Maria delle Croci”, Viale Vincenzo Randi, Ravenna, Italy
11. Department of “Organi di Senso,” University “Sapienza,” Rome, Italy
12. Otolaryngology Department, Azienda Sanitaria Locale CN2, Alba, Italy
13. Department of Medical and Surgical Sciences and Advanced Technologies “GF Ingrassia,” ENT Section, University of Catania, Catania, Italy
14. Infectious Disease Unit, Azienda Unità Sanitaria Locale – IRCCS di Reggio, Emilia, Italy
15. Anesthesia and Intensive Care, Anestesia e Terapia Intensiva Polivalente, Azienda Ospedaliero-Universitaria, Sant’Orsola-Malpighi – Alma Mater Studiorum, Bologna, Italy
16. Intensive Care Unit, Morgagni-Pierantoni Hospital, AUSL of Romagna, Forlì, Italy