Affiliation: | 1. Department of Oral Medicine and Pathology, Dental School, University of Athens, Athens, Greece;2. Oral Medicine Department, 251 General Air Force and VA Hospital, Athens, Greece;3. Department of Pathology, Medical School, University of Athens, Athens, Greece;4. Department of Pathology and Cytology, Carolinska University Hospital and Karolinska Institute, Solna, Sweden |