1. Department of Medical Sciences: Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
2. Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
3. Department of Epidemiology, Erasmus Medical Centre, Rotterdam, Netherlands
4. Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
5. Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
6. Department of Respiratory Medicine, Erasmus Medical Centre, Rotterdam, Netherlands
7. Department of Medical Sciences: Clinical Physiology, Uppsala University, Uppsala, Sweden
8. School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
9. Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro, Sweden
10. Department of Respiratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden