1. University Clinic for Traumatology, Orthopedic Disease, Anesthesiology, Reanimation and Intensive Care Medicine and Emergency Department, Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, R. Macedonia
2. University Clinic for Neurology, Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, R. Macedonia
3. University Clinic for Abdominal Surgery, Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, R. Macedonia