[1] Vienna Hlth Care Grp, Karl Landsteiner Inst Lung Res & Pulm Oncol, Dept Resp & Crit Care Med, Vienna, Austria
[2] Pirogov Russian State Natl Res Med Univ, Dept Pulmonol, Moscow, Russia
[3] Sechenov Univ, IM Sechenov First Moscow State Med Univ, Dept Pulmonol, Moscow, Russia
[4] Charles Univ Hosp, Dept Pulmonol, Fac Med Hradec Kralove, Hradec Kralove, Czech Republic
[5] Comenius Univ, Fac Med, Univ Hosp Martin, Martin, Slovakia
[6] Inst Pulm Dis Vojvodina, Dept Resp Pathophysiol & Sleep Disordered Breathi, Sremska Kamenica, Serbia
[7] Univ Novi Sad, Fac Med, Novi Sad, Serbia
[8] Inst Pulm Dis, Adult Pulm Dept, Torokbalint, Hungary
[9] Iuliu Hatieganu Univ Med & Pharm, Pulmonol Dept, Cluj Napoca, Romania
[10] Univ Latvia, Fac Med, Dept Internal Dis, Riga, Latvia
[11] Univ Zagreb, Sch Med, Zagreb, Croatia
[12] Med Univ Bialystok, Dept Lung Dis & Chemotherapy Resp Neoplasms 1, Bialystok, Poland
[13] Med Univ Sofia, Dept Pulm Dis, Sofia, Bulgaria