1. From the Respiratory Medicine Section, Department of Clinical Medicine and Surgery, Federico II University of Naples, Via S Pansini 5, 80131 Naples, Italy (M.B., L.C., D.S.); and Department of Radiology (R.L., F.R., G.S., G.B., E.M., T.V., G.R.) and Pathophysiology and Respiratory Rehabilitation Department of Critical Area (G.F.), Monaldi Hospital, AO dei Colli, Naples, Italy.