1 Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital of Modena, Via Largo del Pozzo 71, Modena, Italy.
2 Bronchoscopy and Respiratory Diseases Department, University Hospital of Modena, Via Largo del Pozzo 71, Modena, Italy.
3 Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital of Modena, Via Largo del Pozzo 71, Modena, Italy. matteo.fermi.med@gmail.com.