1 Section of Respiratory Diseases, Department of Cardiac, Thoracic, and Vascular Sciences, University of Padova, 35128 Padova, Italy. Electronic address: paolo.spagnolo@unipd.it.
2 Operative Unit of Pathologic Anatomy, Azienda USL Romagna, Hospital S Maria delle Croci, Ravenna, Italy.
3 Interventional Pulmonology Unit, Policlinico Sant'Orsola-Malpighi, Bologna, Italy.
4 Section of Diagnostic Imaging, Department of Surgery, University of Parma, Parma, Italy.
5 Department of Medicine, University of Cincinnati Medical Center, Cincinnati, OH, USA.
6 Royal Brompton and Harefield National Health Service Foundation Trust, Interstitial Lung Disease Unit, London, UK.