1. Neurosurgery Unit, Head and Neck Department, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy
2. Department of Surgery, Cardiology Unit, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy
3. Department of Anesthesiology and Intensive Care Medicine, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy