1. “Denta Med” Pristina , Republic of Kosovo
2. University Dental Clinical Centre , Department of periodontology and oral pathology, Faculty of dentistry , “Ss. Cyril and Methodius University” , Skopje , R.N. Macedonia
3. University Dental Clinical Centre , Department of periodontology and oral pathology , Skopje , R.N. Macedonia
4. University Dental Clinical Centre , Department of Dental Emergency-Pristina , Republic of Kosovo ,
5. PZU “Ilinden 96” Skopje , R.N. Macedonia
6. „Dr. Spasovski” Skopje , R.N. Macedonia