1. 3rd University General Hospital, ‘AHEPA’ University Hospital, Thessaloniki, Greece
2. Intensive Care Unit, ‘AHEPA’ University Hospital, Aristotle University of Thessaloniki, Medical School, Thessaloniki, Greece
3. Oncology Department, General Hospital of Serres, Greece
4. Department of Cardiology/Pulmonology/Intensive Care/Nephrology, Sana Clinic Group Franken,‘Hof’ Clinics, University of Erlangen, Hof, Germany
5. Department of Respiratory & Critical Care Medicine, Changhai Hospital, The Second Military Medical University, Shanghai, PR China
6. Oncology Department, (NHS), General Hospital of Kavala, Kavala, Greece
7. Oncology Department, Interbalkan European Medical Center, Thessaloniki, Greece
8. Thoracic Surgery Department, ‘Interbalkan’ European Medical Center, Thessaloniki, Greece
9. Oncology Department, General Hospital of Volos, Greece
10. Second Department of Surgery, University Hospital of Alexandroupolis, Medical School, Democritus University of Thrace, Alexandroupolis, Greece