1. University of Belgrade, Faculty of Medicine, Belgrade, Serbia + Clinical Center of Serbia, Clinic for Neurosurgery, Belgrade, Serbia
2. University of Kragujevac, Faculty of Medical Sciences, Kragujevac, Serbia + Clinical Center of Kragujevac, Center for Neurosurgery, Kragujevac, Serbia
3. Clinical Center of Serbia, Clinic for Neurosurgery, Belgrade, Serbia
4. Clinical Center of Serbia, Center for Radiology and MRI, Belgrade, Serbia