1. Department of Anesthesia and Intensive Care; Ospedali Riuniti di Bergamo; Bergamo; Italy
2. Department of Neurology; Ospedali Riuniti di Bergamo; Bergamo; Italy
3. Department of Neurosurgery; Ospedali Riuniti di Bergamo; Bergamo; Italy
4. Department of Medical and Surgical Sciences; Surgical Clinic; A.O. Bolognini; Bergamo; Italy