1 Department of Anesthesia, Intensive Care and Prehospital Emergency, Maggiore Hospital Carlo Alberto Pizzardi, Bologna, Italy. Electronic address: federico.semeraro@ausl.bologna.it.
2 Centrale Operativa 118 Emilia Est, Maggiore Hospital Carlo Alberto Pizzardi, Bologna, Italy.
3 Department of Anesthesia, Intensive Care and Prehospital Emergency, Maggiore Hospital Carlo Alberto Pizzardi, Bologna, Italy.