1 Interventional Ultrasound Unit, Department of Internal Medicine, Casa Sollievo della Sofferenza Hospital, IRCCS, Viale Cappuccini, 1, 71013, San Giovanni Rotondo, FG, Italy; Department of Internal Medicine, Casa Sollievo della Sofferenza Hospital, IRCCS, San Giovanni Rotondo, FG, Italy; Department of Radiology, Ultrasound Diagnostic Unit, Monaldi Hospital,AO dei Colli, Naples, Italy. Electronic address: sperandeom@libero.it.
2 Interventional Ultrasound Unit, Department of Internal Medicine, Casa Sollievo della Sofferenza Hospital, IRCCS, Viale Cappuccini, 1, 71013, San Giovanni Rotondo, FG, Italy; Department of Internal Medicine, Casa Sollievo della Sofferenza Hospital, IRCCS, San Giovanni Rotondo, FG, Italy; Department of Radiology, Ultrasound Diagnostic Unit, Monaldi Hospital,AO dei Colli, Naples, Italy.