[1] National and Kapodistrian University of Athens,First Department of Pulmonary Medicine and Intensive Care Unit
[2] Medical School,5Th Respiratory Medicine Department
[3] General Hospital for Chest Diseases of Athens “SOTIRIA”,Department of Respiratory Medicine, Faculty of Medicine
[4] University of Thessaly,Department of Respiratory Medicine
[5] BIOPOLIS,2Nd Respiratory Medicine Department
[6] University General Hospital of Heraklion,7Th Respiratory Medicine Department
[7] Medical School,Department of Respiratory Medicine, Medical School
[8] University of Crete,Department of Pulmonary Medicine
[9] General Hospital for Chest Diseases of Athens “SOTIRIA”,Department of Informatics and Telecommunications, School of Informatics and Telecommunications
[10] Athens “Sotiria” Chest Diseases Hospital,Respiratory Medicine Department
[11] Iatriko Athinon,undefined
[12] University General Hospital of Alexandroupolis,undefined
[13] Democritus University of Thrace,undefined
[14] General Hospital of Thessaloniki “Georgios Papanikolaou”,undefined
[15] University of Ioannina,undefined
[16] University Hospital of Ioannina,undefined