1. Department of Pneumophysiology, Faculty of Medicine and Pharmacy, University of Oradea, Oradea, Romania
2. Internal Medicine Discipline, Faculty of Medicine, Ovidius University of Constanţa, Constanţa, Romania
3. Department of Pulmonology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
4. Department of Pulmonology, Victor Babes University of Medicine and Pharmacy, Timişoara, Romania
5. Department of Pulmonology II, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
6. Preclinic Department, Faculty of Medicine, Titu Maiorescu University, Bucharest, Romania