1 Unit of Interventional Ultrasound of Internal Medicine, IRCCS Hospital Casa Sollievo della Sofferenza, San Giovanni Rotondo (FG), Italy. Electronic address: sperandeom@libero.it.
2 Department of Radiology, Monaldi Hospital, Naples, Italy.
3 Division of Neonatology, Monaldi Hospital, Naples, Italy.
4 Department of Internal Medicine, IRCCS Hospital Casa Sollievo della Sofferenza, San Giovanni Rotondo (FG), Italy.