1. Department of Materials ScienceUniversity of Patras Patras Greece
2. Dentomaxillofacial Radiology Department251 Hellenic Air Force and VA General Hospital Athens Greece
3. Foundation for Research & Technology‐Hellas/ICE‐HT (FORTH/ICE‐HT) Patras Greece
4. National Hellenic Research Foundation – TPCI, (NHRF/TPCI) Athens Greece