1. 3rd Department of Surgery, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
2. Second Department of Surgery, University Hospital of Alexandroupolis, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
3. Pulmonary Department, Creta InterClinic Private Hospital, Iraklio, Crete, Greece
4. Anesthesiology Department, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
5. Thoracic Surgery Department, Interbalkan European Medical Center, Thessaloniki, Greece
6. Oncology Department, General Hospital of Kavala, Kavala, Greece
7. Sana Clinic Group Franken, Department of Cardiology/Pulmonology/Intensive Care/Nephrology, ‘Hof’ Clinics, University of Erlangen, Hof, Germany
8. The Diagnostic & Therapeutic Center of Respiratory Diseases, Shanghai East Hospital, Tongji University, Shanghai, China
9. General Surgery Clinic 1, University of Medicine andPharmacy of Craiova, Craiova County Emergency Hospital, Craiova, Romania