1. 1st Faculty of Medicine of Charles University , Prague , Czech Republic
2. Department for Respiratory Diseases Jordanovac , University Hospital Centre Zagreb, School of Medicine, University of Zagreb , Zagreb , Croatia
3. Institute of Oncology Ljubljana , Ljubljana , Slovenia
4. Faculty of Medicine, University of Ljubljana , Ljubljana , Slovenia
5. Department of Oncology and Radiotherapy, Medical University of Gdansk , Gdansk , Poland
6. Institute of Oncology “Prof. Dr. Ion Chiricuta” , Cluj-Napoca , Romania
7. Institute for Oncology and Radiology of Serbia , Belgrade , Serbia
8. National Koranyi Institute of TB and Pulmonology , Budapest , Hungary
9. Department of Oncology, University of Warmia and Mazury in Olsztyn , Olsztyn , Poland