1. Department of Preventive Dentistry, Periodontology and Implant Biology, Aristotle University Thessaloniki, Thessaloniki, Greece.
2. Hematology Unit, Second Department of Internal Medicine, Aristotle University, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece.
3. Department of Oral and Maxillofacial Surgery, Aristotle University Thessaloniki.