1. 1st Respiratory Medicine Department, National and Kapodistrian University of Athens, Medical School, “Sotiria” Chest Hospital, Athens, Greece
2. Medical School, Department of Respiratory Medicine, General Hospital G. Papanikolaou, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. Division for Lung and Airway Research, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
4. Pulmonologist, Trikala, Greece
5. Medical School, 2nd Respiratory Medicine Department, General University Hospital “Attikon”, National and Kapodistrian University of Athens, Athens, Greece