1. Department of Thoracic Medicine, University of Crete, Heraklion, Greece.
2. Interstitial Lung Disease Unit, Imperial College, Faculty of Medicine, London, U.K.
3. Department of Hematology, University of Crete, Heraklion, Greece.
4. Department of Experimental Physiology, University of Athens, Greece.
5. Department of Pneumonology, Democritus University of Thrace, Alexandroupolis, Greece.