1. 3rd Department of Surgery, ‘AHEPA’ University Hospital, Aristotle University of Thessaloniki, Medical School, Thessaloniki, Greece
2. Anesthesiology Department, ‘AHEPA’ University Hospital, Aristotle University of Thessaloniki, Medical School, Thessaloniki, Greece
3. Department of Respiratory & Critical Care Medicine, Changhai Hospital, the Second Military Medical University, Shanghai, PR China
4. Department of Cardiology/Pulmonology/Intensive Care/Nephrology, Sana Clinic Group Franken, ‘Hof’ Clinics, University of Erlangen, Hof, Germany