1 Santiago de Compostela University, School of Medicine and Dentistry, Special Needs Unit, Santiago de Compostela, Spain 2 Tel-Aviv University, School of Dental Medicine, Tel-Aviv, Israel 3 Griffith Health Institute, Gold Coast Campus, Queensland, Australia 4 University of Copenhagen, Department of Oral Medicine, Section of Oral Pathology & Medicine, Copenhagen, Denmark 5 University of Parma, O...