[1
]
School of Medicine Zagreb, University Hospital Dubrava, Zagreb, Croatia.
[2
]
Department of Pneumology, University Hospital Hradec Kralove, Faculty of Medicine
in Hradec Kralove, Charles University in Prague, Hradec Kralove, Czech Republic.
[3
]
Pneumology Department, Hospital Universitari Vall d'Hebron, CIBER de Enfermedades
Respiratorias (CIBERES), Barcelona, Spain.
[4
]
Department of Respiratory and Critical Care Medicine, Ludwig-Boltzmann-Institute for
COPD and Respiratory Epidemiology, Otto-Wagner-Spital, Wien, Austria.
[5
]
Clinic for Pulmonary Diseases, Clinical Centre of Serbia, Faculty of Medicine, Belgrade,
Serbia.
[6
]
Department of Pneumology, School of Medicine in Katowice, Medical University of Silesia,
Katowice, Poland.
[7
]
Department of Pulmonology, University of Szeged, Deszk, Hungary.
[8
]
Laboratory of Pulmonology, Moscow State University of Medicine and Dentistry named
after A.I. Evdokimov, Moscow, Russian Federation.
[9
]
Clinic of Pulmonary Diseases, Military Medical Academy, Sofia, Bulgaria.
[10
]
Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University,
Brno, Czech Republic.
[11
]
Pulmonary Department, Topolsica Hospital, Topolsica, Slovenia.
[12
]
Faculty of Medicine, University of Latvia, Riga, Latvia.
[13
]
Department of Respiratory Medicine and Tuberculosis, Faculty of Medicine, P.J. Safarik
University, Kosice, Slovakia ruzena.tkacova@upjs.sk.