1 Department of Clinical Medicine, Public Health, Life and Environmental Sciences, University of L'Aquila, L'Aquila, Italy - gabriele.disilvestre@live.it.
2 Department of Clinical Medicine, Public Health, Life and Environmental Sciences, University of L'Aquila, L'Aquila, Italy.
3 Department of Anesthesia and Intensive Care Unit, G. Mazzini Hospital, Teramo, Italy.