1. Department of Surgery, Anesthesia and Intensive; Care Section “G.B. Morgagni-Pierantoni” Hospital; Forlì Italy
2. Anesthesia and Intensive Care; University of Ferrara; Italy
3. Medical Diagnostic Department; Kingsbridge Private Hospital; Belfast UK
4. Department of Emergency, Anesthesia and Intensive Care Section; “M. Bufalini Hospital”; Cesena Italy