1 University of Florence, Trauma and Extracorporeal Life Support Intensive Care Unit, DAI-DEA, Azienda Ospedaliero Universitaria Careggi, 50134, Florence, Italy. Electronic address: stebam@hotmail.it.
2 General Intensive Care Unit, Ospedale San Gerardo Monza, 20052, Monza, Italy. Electronic address: a.lucchini@hsgerardo.org.