1 Otolaryngology, Audiology and Phoniatric Operative UnitDepartment of Surgical Medical and Molecular Pathology and Critical Care MedicineUniversity of Pisa Pisa, Italy g.fiacchini@gmail.com.
2 Department of Surgical, Medical and Molecular Pathology and Critical Care MedicineUniversity of PisaPisa, Italy.
3 Department of Anaesthesia and Critical Care Cardiothoracic and Vascular Anaesthesia and Intensive Care MedicineAzienda Ospedaliero Universitaria PisanaPisa, Italy.
4 Otolaryngology, Audiology and Phoniatric Operative UnitDepartment of SurgicalMedical and Molecular Pathology andCritical Care MedicineUniversity of PisaPisa, Italy.