1. Medicine and Oral Surgery Department and Institute of Research and Advanced Training in Health Sciences and Technologies (IINFACTS), Higher Institute of Health Sciences (ISCS-N), CESPU, 4585-116 Paredes, Portugal
2. Stomatology and Dental Medicine Department (CESPU), Centro Hospitalar de São João, Polo de Valongo, 4440-563 Valongo, Portugal
3. Oral Medicine Department, Birmingham Dental Hospital, School of Dentistry, University of Birmingham, Birmingham B4 6NN, UK