1. Department of Pulmonary Diseases and Allergy University Medical Centre Ljubljana Ljubljana Slovenia
2. Faculty of Medicine Ljubljana University of Ljubljana Ljubljana Slovenia
3. Department of Thoracic Surgery University Medical Centre Ljubljana Ljubljana Slovenia
4. Institute of Radiology University Medical Centre Ljubljana Ljubljana Slovenia
5. Cytology and Pathology Laboratory University Clinic of Respiratory and Allergic Diseases Golnik Golnik Slovenia
6. Department of Intensive Internal Medicine University Medical Centre Ljubljana Ljubljana Slovenia
7. DIMES S. Orsola University Hospital University of Bologna and IRCCS Bologna Italy