[1] Pneumol Praxis Leipzig, Leipzig, Germany
[2] Chiesi GmbH Hamburg, Hamburg, Germany
[3] Univ Oxford, Oxford, England
[4] Copenhagen Univ Hosp Hvidovre, Dept Pulm Med, Hvidovre, Denmark
[5] Vienna Healthcare Grp, Karl Landsteiner Inst Clin & Expt Pneumol, Clin Hietzing, Vienna, Austria
[6] Praxis Innere Med & Pneumol, Northeim, Germany