1. Medicine and Oral Surgery Department University Institute of Health Sciences (IUCS), CESPU Gandra Portugal
2. UNIPRO, Oral Pathology and Rehabilitation Research Unit University Institute of Health Sciences (IUCS), CESPU Gandra Portugal
3. Faculty of Dentistry, Oral & Craniofacial Sciences King's College London, and the WHO Collaborating Centre for Oral Cancer London UK