1. Pulmonary Department, ``Bioclinic`` Private Hospital, Thessaloniki, Greece
2. 3rd Department of Surgery, ``AHEPA`` University Hospital, Aristotle University of Thessaloniki, Medical School, Thessaloniki, Greece
3. Sana Clinic Group Franken, Department of Cardiology/Pulmonology/Intensive Care/Nephrology, “Hof” Clinics, University of Erlangen, Hof, Germany
4. Department of Respiratory & Critical Care Medicine, Changhai Hospital, the Second Military Medical University, Shanghai, P. R. China
5. Pulmonary Department, (NHS), ``G. Papanikolaou`` General Hospital, Thessaloniki, Greece
6. Oncology Department, (NHS), General Hospital of Kavala, Kavala, Greece
7. Thoracic Surgery Department, ``Interbalkan`` European Medical Center, Thessaloniki, Greece
8. Radiology Department , ``Euromedica`` Private Laboratory, Thessaloniki, Greece
9. Second Department of Surgery, General University Hospital of Alexandroupolis, Medical School Democritus University of Thrace, Alexandroupolis, Greece
10. Department of Pulmonology, University Hospital Zurich Rämistrasse 100, 8091, Zurich, Switzerland