1. 1 University Clinic for Traumatology, Orthopedic Diseases, Anesthesiology, Reanimation , Intensive Care Medicine and Emergency Department, Clinical center Mother Theresa , Skopje , RN Macedonia
2. 2 Faculty of Medicine “Cyril and Methodious,” , Skopje , RN Macedonia
3. 3 University Clinic for Thoraco-vascular surgery , Clinical center Mother Theresa , Skopje , RN Macedonia
4. 4 University Clinic of Cardiology , Skopje , RN Macedonia
5. 5 University Clinic for Neurological Diseases, Clinical center Mother Theresa , Faculty of Medicine “Cyril and Methodious,” , Skopje , RN Macedonia
6. 6 University Clinic for Abdominal surgery , Clinical center Mother Theresa , Skopje , RN Macedonia
7. 7 University Children’s hospital , Belgrade , Serbia
8. 8 Medical Faculty Belgrade , Serbia
9. 9 Institute for Pathophysiology and Nuclear Medicine , Skopje , RN Macedonia