[1] Azienda Ospedaliera SS Antonio & Biagio & Cesare A, Dept Anaesthesiol & Intens Care, Alessandria, Italy
[2] Michele & Pietro Ferrero Hosp, Fdn Osped Alba Bra, Verduno, Italy
[3] Michele & Pietro Ferrero Hosp, Dept Emergency Med, Anaesthesia & Crit Care Med, Verduno, Italy
[4] Policlin Univ A Gemelli, Fdn, Dept Emergency Med, IRCSS, Rome, Italy