1. School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
2. Department of Medical Sciences, Respiratory, Allergy & Sleep Research, Uppsala University, Uppsala, Sweden
3. Department of Medical Sciences: Environmental and Occupational Medicine, Uppsala University, Uppsala, Sweden
4. Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
5. Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro, Sweden
6. Clinical Epidemiology Division, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
7. Department of Epidemiology and Public Health, University College London, London, UK
8. Department of Neurobiology, Care Sciences and Society, Division of Family Medicine and Primary Care, Karolinska Institutet, Stockholm, Sweden
9. Department of Respiratory Medicine, School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden