1 Department of Otolaryngology - Head and Neck Surgery, University Hospital of Modena, Azienda Ospedaliero-Universitaria di Modena, Modena, Italy.
2 Centre for Regenerative Medicine "Stefano Ferrari", Dipartimento Chirurgico, Medico, Odontoiatrico e di Scienze Morfologiche con Interesse Trapiantologico, Oncologico e di Medicina Rigenerativa, University of Modena and Reggio Emilia, Modena, Italy.
3 Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy.
4 Unit of Otorhinolaryngology, University of Bologna, AUSL Romagna, Ravenna, Italy.