1. 1 Department of Internal Medicine – Pneumology “Grigore T. Popa” University of Medicine and Pharmacy , Iaşi , Romania
2. 2 Clinical Hospital of Pulmonary Diseases , Iaşi , Romania
3. 3 Department of Surgery , “St. Spiridon” Emergency Hospital , Iași , Romania
4. 5 Department of Surgery , “Grigore T. Popa” University of Medicine and Pharmacy , Iaşi , Romania
5. 4 Department of Bronchial Endoscopy , Regional Institute of Oncology , Iași , Romania