1. Institute of Pneumophysiology Marius Nasta , Bucharest , Romania
2. Faculty of Medicine and Pharmacy , Oradea , Romania
3. University of Medicine and Pharmacy Carol Davila , Bucharest , Romania
4. University of Medicine and Pharmacy , Craiova , Romania
5. University of Medicine and Pharmacy Victor Babes , Timisoara , Romania
6. Pneumophtysiology Clinic Leon Daniello , Cluj Napoca , Romania
7. University of Medicine and Pharmacy Iuliu Hatieganu , Cluj Napoca , Romania
8. Faculty of Medicine – Ovidius University , Constanta , Romania