1. Department of Biomaterials and Prosthetic Dentistry, University of Debrecen, Nagyerdei krt. 98, Debrecen 4032, Hungary
2. Department of Periodontology, University of Debrecen, Nagyerdei krt. 98, Debrecen 4032, Hungary
3. Department of Solid State Physics, University of Debrecen, Nagyerdei krt. 98, Debrecen 4032, Hungary
4. Department of Physiology, University of Debrecen, Nagyerdei krt. 98, Debrecen 4032, Hungary
5. Department of Applied Mathematics and Probability Theory, University of Debrecen, Nagyerdei krt. 98, Debrecen 4032, Hungary