1. Department of Surgical, Oncological and Oral Sciences, University of Palermo, Palermo, Italy
2. Oral Medicine Unit, Sheba Medical Center, Tel Hashomer, Israel
3. Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
4. Department of Stomatology University of Valencia, Hospital General Universitario de Valencia, Spain
5. Department of Oral and Maxillofacial Surgery, Ludwig Maximilian University of Munich, Munich, Germany
6. University College London, UCL Eastman Dental Institute London; NIHR University College London Hospitals Biomedical Research Centre, London, UK