1. Department of Neurosurgery, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania
2. Department of Vascular Neurosurgery, National Institute of Neurology and Neurovascular Diseases, 077160 Bucharest, Romania
3. Faculty of Medicine, “Dunarea de Jos” University of Galati, 800201 Galați, Romania
4. Emergency Clinical Hospital “Prof. dr. N. Oblu”, 700309 Iasi, Romania
5. Neurosurgery Department, Sanador Clinical Hospital, 010991 Bucharest, Romania