1. Unit of Otolaryngology, Head and Neck Department, University of Verona, Italy
2. Unit of Maxillo-Facial Surgery and Dentistry, Head and Neck Department, University of Verona, Italy
3. Plastic and Reconstructive Surgery Unit, Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, Italy
4. Cranio-Maxillo-Facial Unit and Biomaterials Laboratory, Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, Modena, Italy.