1 Department of Respiratory Disease, University Hospital Ospedali Riuniti of Foggia, University of Foggia, Viale Pinto, 71121, Foggia, FG, Italy. c.quarato@libero.it.
2 Unit of Interventional and Diagnostic Ultrasound of Internal Medicine, IRCCS Casa Sollievo della Sofferenza Hospital, San Giovanni Rotondo, Italy.
3 Department of Pediatrics, IRCCS Casa Sollievo della Sofferenza Hospital, University of Foggia, San Giovanni Rotondo, Italy.