1 Centrale Operativa 118 Emilia Est (Prehospital Emergency Medical Dispatch Centre), Helicopter Emergency Medical Service, Maggiore Hospital Carlo Alberto Pizzardi, Bologna, Italy; Italian Resuscitation Council Scientific Committee, Italy. Electronic address: guglielmo.imbriaco.work@gmail.com.
2 Centrale Operativa 118 Emilia Est (Prehospital Emergency Medical Dispatch Centre), Helicopter Emergency Medical Service, Maggiore Hospital Carlo Alberto Pizzardi, Bologna, Italy.
3 Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Milan, Italy; Italian Resuscitation Council Scientific Committee, Italy.
4 Department of Anaesthesia and Intensive Care and Prehospital Emergency, Maggiore Hospital Bologna, Bologna, Italy; Italian Resuscitation Council Scientific Committee, Italy.
5 Department of Anaesthesia and Intensive Care and Prehospital Emergency, Maggiore Hospital Bologna, Bologna, Italy.