1. Department of Respiratory and Critical Care Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China;
2. Division of Molecular and Clinical Medicine, University of Dundee, Ninewells Hospital and Medical School, Dundee, Scotland, United Kingdom;
3. Pulmonology Institute and Cystic Fibrosis Center, Carmel Medical Center, Haifa, Israel;
4. Respiratory Institute, Hospital Clínic, Institute of Biomedical Research August Pi i Sunyer, University of Barcelona, Barcelona, Spain;
5. Department of Respiratory Disease, AZ Nikolaas, Sint-Niklaas, Belgium;
6. Department of Respiratory Medicine, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom;
7. Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Kangnam Sacred Heart Hospital, Seoul, Republic of Korea;
8. Pneumology Department, Hospital Universitari Vall d'Hebron, Vall d'Hebron Institut de Recerca (VHIR), Vall d'Hebron Barcelona Hospital Campus, CIBERES, Barcelona, Spain;
9. Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy;
10. Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany; and
11. Istituto di Ricovero e Cura a Carattere Scientifico di natura pubblica Humanitas Research Hospital, Rozzano, Milan, Italy