1. Department of Neurosurgery, University Hospital, Mostar, Bosnia and Herzegovina
2. Semmes-Murphey Clinic, and Department of Neurosurgery, University of Tennessee Health Science Center, Memphis, Tennessee, United States
3. Department of Neurosurgery, Osijek University School of Medicine, Osijek, Croatia
4. Pathology Group of Midsouth, Memphis, Tennessee, United States