1. Department of Neurosurgery, Clinical Center of the University of Sarajevo, Bolnička 25, Sarajevo, Bosnia and Herzegovina
2. Department of Medicine, Sarajevo School of Science of Technology., Hrasnicka cesta 3a, Sarajevo, Bosnia and Herzegovina
3. Department of Neurosurgery, University Medical Center of the Johannes Gutenberg University of Mainz, Mainz, Germany
4. Department of Medicine, Josip Juraj Strossmayer University, Trg Svetog Trojstva3, Osijek, Croatia
5. Department of Medicine, University of Sarajevo, Cekalusa 90, Sarajevo, Bosnia and Herzegovina