1. Azienda USL Romagna. Department of Diseases of the Thorax, Ospedale GB Morgagni, Forlì, Italy
2. Azienda USL Romagna. Department of Anatomic Pathology, Ospedale GB Morgagni, Forlì, Italy
3. Azienda USL Romagna. Department of Radiology, Ospedale GB Morgagni, Forlì, Italy
4. Azienda USL Romagna. Department of Anatomic Pathology, Ospedale Santa Maria delle Croci, Ravenna, Italy
5. Department of Respiratory Diseases and Allergy, Aarhus University Hospital, Aarhus, Denmark