[1] Martini Hosp, POB 30033, NL-9700 RM Groningen, Netherlands
[2] Univ Marburg, Univ Med Ctr Giessen & Marburg, Dept Med Pulm & Crit Care Med, Baldingerstr, D-35043 Marburg, Germany
[3] German Ctr Lung Res DZL, Heidelberg, Germany
[4] Med Univ Lodz, Barlicki Univ Hosp, Dept Internal Med Asthma & Allergy, Ul Kopcinskiego 22, PL-90153 Lodz, Poland