1. University clinic for urology, Faculty of medicine , Ss. Cyril and Methodius University in Skopje , Skopje R. N. Macedonia
2. Institute of Pathology, Faculty of medicine , Ss. Cyril and Methodius University in Skopje , Skopje , R. N. Macedonia
3. Macedonian Academy of Sciences and Arts , Skopje , R. N. Macedonia