1. Pulmonary Research Institute at Lungen Clinic Grosshansdorf, Airway Research Centre North (ARCN), German Centre for Lung Research (DZL), Grosshansdorf, Germany.
2. Chiesi Farmaceutici, S.p.A., Parma, Italy.
3. FLUIDDA, Kontich, Belgium.
4. Department of Pulmonology, Süreyyapaşa Chest Diseases Training and Research Hospital, Istanbul, Turkey.
5. Department of Respiratory and Internal Medicine, University of Ferrara, Ferrara, Italy.