1 From the Department of Anaesthesiology and Intensive Care, Stavanger University Hospital, Stavanger (ES), Department of Anaesthesia and Intensive Care Medicine, Baerum Hospital, Sandvika, Norway (JM-O), Department of Surgical Science, University of Turin, Department of Anaesthesia and Intensive Care, AOU Città della Salute e della Scienza, Turin (LB), and Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples 'Federico II', Naples, Italy (EDR).