1. Department of Medicine and Surgery, Dental Clinic, University of Parma, 43125 Parma, Italy
2. Department of Surgical Sciences, Postgraduate School in Orthodontics, University of Cagliari, 09124 Cagliari, Italy
3. Department of Surgery and Medical-Surgical Specialities, School of Medicine and Health Sciences, University of Oviedo, 33003 Oviedo, Spain
4. Department of Surgical Science, Dentistry, Pediatrics and Gynecology, University of Verona, 37134 Verona, Italy
5. Faculty of Medicine, University of Milano, 20122 Milano, Italy
6. Pediatric Dentistry and Oral Hygiene Unit, IRCCS Sacro Cuore-Don Calabria Hospital, 37024 Negrar di Valpolicella, Italy