1. Ss. Cyril and Methodius University, Faculty of Medicine, University Clinic of Urology, Skopje, North Macedonia
2. Ss. Cyril and Methodius University, Faculty of Medicine, University Clinic for Traumatology, Orthopedic Diseases, Anesthesia, Reanimation, Intensive Care and Emergency Centre, Skopje, North Macedonia
3. Ss. Cyril and Methodius University, Faculty of Medicine, University Clinic of Radiotherapy and Oncology, Skopje, North Macedonia
4. Ss. Cyril and Methodius University, Faculty of Medicine, Institute of Pathology, Skopje, North Macedonia