1 First Academic Department of Pneumonology, Hospital for Diseases of the Chest "Sotiria", Medical School, National and Kapodistrian University of Athens, Athens, Greece.
2 Division of Immunology, Biomedical Sciences Research Center "Alexander Fleming", Athens, Greece.
3 5th Respiratory Department, Hospital for Diseases of the Chest "Sotiria", Athens, Greece.
4 Department of Pneumonology, University Hospital of Alexandroupolis, Democritus University of Thrace, Komotini, Greece.