1 General Intensive Care Unit, Emergency Department - ASST Monza - San Gerardo Hospital, University of Milano-Bicocca, Via Pergolesi 33, Monza, MB, Italy. Electronic address: alberto.lucchini@unimib.it.
2 Department of Health Sciences - University of Florence, Italy. Electronic address: stefano.bambi@unifi.it.
3 Health Economics, Hospital Management and Nursing Research Dept, School of Public Health, Université Libre de Bruxelles, Belgium.