1. Department of Medical Specialities, Pulmonology Unit,
2. Department of Medical and Surgical Sciences, University of Bologna/Forlì Campus, Forlì, Italy;
3. Mersey and West Lancashire Teaching Hospitals NHS Trust, Prescot, United Kingdom; and
4. Department of Pathology, and
5. Department of Radiology, GB Morgagni – L. Pierantoni Hospital, Forlì, Italy;
6. Department of Respiratory Diseases and Allergy, Aarhus University Hospital, Aarhus, Denmark