1 Department of Thoracic Medicine & Laboratory of Cellular and Molecular Pneumonology, Medical School, University of Crete, Heraklion, 71110 Crete, Greece. Electronic address: kantoniou@med.uoc.gr.
2 Clinic of Social and Family Medicine, Medical School, University of Crete, Heraklion, Greece.
3 Department of Thoracic Medicine & Laboratory of Cellular and Molecular Pneumonology, Medical School, University of Crete, Heraklion, 71110 Crete, Greece.
4 Interstitial Lung Disease Unit, Royal Brompton Hospital, London, UK.