1. Department of Biomedical and NeuroMotor Sciences (DiBiNeM), Unit of Dental Care for Special Needs Patients and Paediatric Dentistry University of Bologna Bologna Italy
2. Department of Surgical, Medical, Molecular Pathology and Critical Area, Dental and Oral Surgery Clinic, Unit of Pediatric Dentistry University of Pisa Pisa Italy
3. Department of Pediatric Dentistry, NYU College of Dentistry New York University New York New York USA
4. Department of Pediatric Dentistry, Faculty of Dentistry Universitat Internacional de Catalunya (UIC) Barcelona Spain