1. Department of phthisiology and pulmonology , Bukovinian State Medical University , Chernivtsi , Ukraine
2. Department of pulmonology , University of Medicine and Pharmacy ‘Grigore T. Popa’ , Iasi , Romania
3. Department of phthisiology and pulmonology , Kharkiv National Medical University , Kharkiv , Ukraine
4. Department of phthisiology and pulmonology , Ivano-Frankivsk National Medical University , Ivano-Frankivsk , Ukraine