Andrea Rossi Zadra1, Paolo Ripellino2, Nicoletta Barzaghi3. 1. Department of Anaesthesiology, AO Città della Salute e della Scienza, Turin, Italy. 2. Department of Neurology, University of Turin, Novara, Italy. 3. Department of Cardiovascular Intensive Care Unit, AO S Croce e Carle, Cuneo, Italy.