[1] Careggi Teaching Hospital,Anesthesia and Intensive Care Unit of Emergency Department
[2] Careggi Teaching Hospital,Heart and Vessels Department
[3] University of Florence,Post graduated school of Anesthesia and Intensive Care
[4] Regional Health System,Department of Public Health
[5] University of Firenze,Department of Critical Care Medicine and Surgery
[6] Careggi Teaching Hospital,undefined