1First Department of Pulmonary Medicine and Intensive Care Unit, National and Kapodistrian University of Athens, Medical School, 115 27 Athens, Greece
25Th Respiratory Medicine Department, General Hospital for Chest Diseases of Athens “SOTIRIA”, Athens, Greece
3Department of Respiratory Medicine, Faculty of Medicine, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece
4Department of Respiratory Medicine, University General Hospital of Heraklion, Medical School, University of Crete, 71003 Heraklion, Greece
52Nd Respiratory Medicine Department, General Hospital for Chest Diseases of Athens “SOTIRIA”, Athens, Greece
67Th Respiratory Medicine Department, Athens “Sotiria” Chest Diseases Hospital, Athens, Greece
7Iatriko Athinon, Areos 41, Paleo Faliro, Greece
8Department of Respiratory Medicine, Medical School, University General Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
9Department of Pulmonary Medicine, General Hospital of Thessaloniki “Georgios Papanikolaou”, G. Papanikolaou Ave, 57010 Exohi, Greece
10Department of Informatics and Telecommunications, School of Informatics and Telecommunications, University of Ioannina, Arta, Greece
11Respiratory Medicine Department, University Hospital of Ioannina, Ioannina, Greece
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