1. Department of Fixed Prosthesis and Implant Prosthodontics, School of Dentistry, Aristotle University of Thessaloniki (A.U.TH.), Thessaloniki, Greece.
2. Department of Conservative Dentistry, Periodontology and Preventive Dentistry, Hannover Medical School (MHH), Hannover, Germany.
3. Department of Physiology and Pharmacology, School of Medicine, Aristotle University of Thessaloniki (A.U.TH.), Thessaloniki, Greece.
4. Department of Oral Medicine and Pathology, School of Dentistry, Aristotle University of Thessaloniki (A.U.TH.), Thessaloniki, Greece.
5. Laboratory of Pharmacology, School of Pharmaceutical Sciences, Aristotle University of Thessaloniki (A.U.TH.), Thessaloniki, Greece.