1 Quality of care and clinical networks Regional Health Department - Tuscany Region, Florence, Italy.
2 CRIMEDIM - Research Center in Emergency and Disaster Medicine, University of Piemonte Orientale, Novara, Italy.
3 Health Science Department, Section of Anesthesia and Critical Care, University of Florence, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy.
4 Technological Innovation in Clinical-Assistance Activities Unit, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy.
5 Anesthesia and Intensive Care Medicine, Imperial College of London, London, UK.