1. Pulmonary Department, General Clinic Euromedica Private Hospital, 851 05 Thessaloniki, Greece
2. 3rd Surgery Department, AHEPA University Hospital, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece
3. Department of Food Technology, School of Food Technology and Nutrition, Alexander Technological Educational Institute, 574 00 Thessaloniki, Greece
4. Laboratory of Social Medicine, Medical School, Democritus University of Thrace, 691 00 Alexandroupolis, Greece
5. Oncology Department, General Hospital of Rhodes, 851 00 Rhodes, Greece
6. Pulmoanry Department, G. Papanikolaou General Hospital, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece
7. Intensive Care Unit (ICU), General Clinic Euromedica, 153 43 Thessaloniki, Greece
8. Department of Respiratory Medicine, Medical School, Democritus University of Thrace, 691 00 Alexandroupolis, Greece