1. Department of Anaesthesiology and Intensive Care, Azienda Ospedaliera SS. Antonio e Biagio e Cesare Arrigo, Alessandria, Italy
2. Foundation of "Ospedale Alba-Bra", Department of Emergency Medicine, Anaesthesia and Critical Care Medicine,
Michele and Pietro Ferrero Hospital, Verduno, Italy
3. Department Of Emergency Medicine - Fondazione Policlinico Universitario A. Gemelli, IRCSS, Rome, Italy
4. Department of Physiology and Pharmacology, Sapienza University of Rome, Rome, Italy
5. Department of Emergency Medicine and Anesthesia and Critical Care, San Giacomo Hospital, Novi Ligure (AL), Italy
6. Clinical Echocardiography and Urgency Ultrasound, Emergency Medicine, Fondazione IRCCS San Matteo, 27100 Pavia, Italy