1. Clinic of Pneumology and Respiratory Cell Research; University Hospital; Basel Switzerland
2. Faculty of Medicine; University of Belgrade; Clinic for Pulmonary Diseases; Belgrade Serbia
3. Department of Microbiology, CIBER Enfermedades Respiratorias; Hospital Universitari Germans Trias i Pujol; Badalona Spain
4. Department of Pneumology, CHU Liege, GIGAI Research Group; University of Liege; Liege Belgium
5. Department of Pneumology; Amphia Hospital/Erasmus MC; Breda The Netherlands
6. Department of Pneumology; Medizinische Hochschule Hannover; Hannover Germany
7. Department of Pneumology; University of Thessaly, Medical School; Larissa Greece
8. Department of Pathophysiology and Transplantation; Università degli Studi di Milano; Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico Milan Italy
9. Department of Pneumology; Medisch Centrum Alkmaar; Alkmaar The Netherlands
10. Department of Pneumology; Hospital Clinic; Barcelona Spain
11. Department of Respiratory Medicine; Maastricht University Medical Center; Maastricht The Netherlands