1. a Chief Assistant, Maxillo-Facial Surgery Operative Unit, Head and Neck Department, University of Parma, Parma, Italy
2. b Resident, Maxillo-Facial Surgery Operative Unit, Head and Neck Department, University of Parma, Parma, Italy
3. c Full Professor, Operative Unit of Orthodontics, Head and Neck Department, University of Parma, Parma, Italy
4. d Resident, Maxillo-Facial Surgery Operative Unit, Head and Neck Department, University of Parma, Parma, Italy
5. e Full Professor, Chief, Maxillo-Facial Surgery Operative Unit, Head and Neck Department, University of Parma, Parma, Italy