1. Neurosurgery Department, Sibiu County Emergency Hospital, 550245 Sibiu, Romania
2. Department of Neurosurgery, “Lucian Blaga” University of Medicine, 550024 Sibiu, Romania
3. Neurosurgery Department, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania
4. Neurosurgery Department, Sanador Clinical Hospital, 70000 Bucharest, Romania
5. Romanian Academy, Calea Victoriei 125, 010071 Bucharest, Romania