1. Department of Neurosurgery, Victor Papilian Faculty of Medicine, Lucian Blaga University, Sibiu, Romania; Department of Neurosurgery, Emergency County Hospital, Sibiu, Romania
2. Department of Neurosurgery, Faculty of Medicine and Pharmacy, University of Oradea, Romania; Department of Neurosurgery, Bihor Emergency County Hospital, Oradea, Romania
3. Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
4. Carol Davila University of Medicine and Pharmacy, Bucharest, Romania; Department of Neurosurgery, Sanador Clinical Hospital, Bucharest, Romania