1. 2nd Respiratory Department, Attikon University Hospital National and Kapodistrian University of Athens Medical School Athens Greece
2. 7th Respiratory Clinic, "Sotiria" Chest Hospital Athens Greece
3. Pulmonary Department Aristotle University of Thessaloniki, G. Papanikolaou Hospital Thessaloniki Greece
4. Outpatient Respiratory Clinic Heraklion Greece
5. Allergy Unit, 2nd Department of Dermatology and Venereology Attikon University General Hospital Athens Greece
6. 5th Respiratory Clinic, "Sotiria" Chest Hospital Athens Greece
7. Pulmonary Department 424 Army General Hospital Thessaloniki Greece
8. 1st Respiratory Department National and Kapodistrian University of Athens Medical School, “Sotiria” Chest Hospital Athens Greece
9. Respiratory Medicine School of Medicine University of Crete Heraklion Greece
10. Private Practice Chania Greece
11. Department of Respiratory Medicine, Medical School Democritus University of Thrace, University General Hospital Dragana Alexandroupolis Greece
12. 1st Pulmonary Department Papanikolaou General Hospital Thessaloniki Thessaloniki Greece
13. Private Practice Kalamata Greece
14. Pulmonary Department Corfu General Hospital Corfu Greece
15. Private Practice Trikala Greece
16. GSK Medical Department Greece Athens Greece
17. Respiratory Medicine Department University of Ioannina Medical School Ioannina Greece