1 Department of Medical and Surgical Sciences, Institute of Respiratory Diseases, Azienda Ospedaliero Universitaria Riuniti di Foggia, COVID-19 Center, Foggia, Italy.
2 Department of Radiology, IRCCS Fondazione Casa Sollievo della Sofferenza, COVID-19 Center, San Giovanni Rotondo, Italy.
3 Interventional and Diagnostic Ultrasound Unit, Department of Internal Medicine, IRCCS Fondazione Casa Sollievo della Sofferenza, COVID-19 Center, San Giovanni Rotondo, Italy.