1. Neurosurgery Department, Araba University Hospital, Vitoria-Gasteiz, Basque Country, Spain
2. Pediatric Neurosurgery Department, Virgen del Rocío Hospital, Seville, Andalusia, Spain
3. Advanced Neurology Center, Seville, Andalusia, Spain
4. Group of Advanced Neurology, Seville, Andalusia, Spain
5. Pediatric Anesthesiology Department, Hospital Virgen del Rocío, Seville, Andalusia, Spain
6. Neurosurgery Department, Hospital Complex of Navarre, Pamplona, Navarre, Spain
7. Anesthesiology and Reanimation Department, Hospital Complex of Navarre, Pamplona, Navarre, Spain