1. Department of Thoracic Surgery, “Attikon” University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece
2. 2nd Department of Anesthesiology, “Attikon” University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece
3. 2nd Pulmonary Medicine Department, “Attikon” University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece
4. Department of Clinical Pathophysiology, General Hospital of Athens “Laiko”, National and Kapodistrian University of Athens, 11527 Athens, Greece