1. Department of Neurosurgery, Sestre Milosrdnice University Hospital Center, Zagreb, Croatia
2. School of Dental Medicine and Health, J.J. Strossmayer University of Osijek, Osijek, Croatia
3. J.J. Strossmayer University of Osijek School of Medicine, Osijek, Croatia
4. Poplar Healthcare, Memphis, TN, USA
5. Department of Neurosurgery, University of Tennessee Health Science Center, Memphis, TN, USA
6. Semmes Murphey Clinic, Memphis, TN, USA