1. Otolaryngology Unit; Arcispedale Santa Maria Nuova-IRCCS; Reggio Emilia Italy
2. Endocrinology Unit , Department of Surgery; Arcispedale Santa Maria Nuova-IRCCS; Reggio Emilia Italy
3. Department of Otorhinolaryngology-Head and Neck Surgery; Mayo Clinic; Rochester Minnesota U.S.A
4. Scientific Directorate; Arcispedale Santa Maria Nuova-IRCCS; Reggio Emilia Italy