1. Cranio-Maxillo-Facial Surgery Unit, Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, Largo del Pozzo 71, 41124 Modena, Italy
2. Unit of Dentistry and Maxillo-Facial Surgery, Surgery, Dentistry, Maternity and Infant Department, University of Verona, P.le L.A. Scuro 10, 37134 Verona, Italy
3. Cranio-Maxillo-Facial Surgery Unit, University Hospital of Modena, Largo del Pozzo 71, 41124 Modena, Italy
4. Pediatric Onco-Haematology Unit, Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, Largo del Pozzo, 71, 41124 Modena, Italy
5. Unit of Psychology, Azienda Ospedaliero Universitaria di Modena, Largo del Pozzo 71, 41124 Modena, Italy
6. Pediatric Unit, Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, Largo del Pozzo 71, 41124 Modena, Italy