1 Department of Otorhinolaryngology "Guglielmo da Saliceto" Hospital, Via Cantone del Cristo 40, 29121, Piacenza, Italy. Electronic address: [email protected].
2 Department of Otorhinolaryngology "Guglielmo da Saliceto" Hospital, Via Cantone del Cristo 40, 29121, Piacenza, Italy.
3 Department of Economics and Social Sciences, Università Cattolica del S. Cuore, Via Emilia Parmense 84, 29122, Piacenza, Italy.
4 Department of Otorhinolaryngology "Guglielmo da Saliceto" Hospital, Via Cantone del Cristo 40, 29121, Piacenza, Italy; Department of Medicine and Surgery, University Hospital of Parma, Italy.