1 Department of Anaesthesiology and Intensive Care, Azienda Ospedaliera SS. Antonio e Biagio e Cesare Arrigo, Alessandria, Italy.
2 Foundation of "Ospedale Alba-Bra" and Department of Emergency Medicine, Anaesthesia and Critical Care Medicine, Michele and Pietro Ferrero Hospital, Verduno, Italy.
3 Department Of Emergency Medicine - Fondazione, Policlinico Universitario A. Gemelli, IRCSS, Rome, Italy.