1. Department of Pulmonology, Heart and Lung Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
2. Finnish Lung Health Association (FILHA ry), Helsinki, Finland
3. The Organization for Respiratory Health in Finland, Helsinki, Finland
4. Department of Allergology, Inflammation Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
5. Department of Pulmonary Diseases and Clinical Allergology, University of Turku, Turku, Finland