Francesca M Trovato1, Daniela Catalano2. 1. Department of Clinical and Experimental Medicine, The University Hospital of Catania, Catania, Italy; Accident and Emergency Department, Ospedale Civile, Ragusa, Italy. Electronic address: trovatofrancesca@gmail.com. 2. Department of Clinical and Experimental Medicine, The University Hospital of Catania, Catania, Italy; Postgraduate School of Clinical Ultrasound, University of Catania, Catania, Italy.