1. Department of Preventive Dentistry, Periodontology & Implant Biology, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki
2. Department of Prosthodontics, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki
3. Department of Molecular Pathology, Netherlands Cancer Institute
4. Department of Plastic Surgery and Hand Surgery, University Hospital Zurich