1 Department of Diagnostic Imaging, General Radiology Section, AO dei Colli, Monaldi Hospital, Naples, Italy. Electronic address: [email protected].
2 Department of Clinical Medicine and Surgery, Respiratory Medicine Section, "Federico" II University of Naples, AO dei Colli, Monaldi Hospital, Naples, Italy.
3 Department of Medicine, I.R.C.C.S. Policlinico San Matteo, Pavia, Italy.