Affiliation: | 1. Department of University Healthcare Research Centre, Faculty of Medicine and Health, ?rebro University, ?rebro, Sweden;2. Ann‐Britt Zakrisson, Region ?rebro County, University Healthcare Research Centre (UFC), ?rebro, Sweden.;3. Centre for Clinical Research, County Council of V?rmland, Karlstad, Sweden;4. Department of Medical Sciences, Lung Allergy and Sleep Research, Uppsala University, Uppsala, Sweden;5. School of Medical Sciences, ?rebro University, Orebro, Sweden;6. Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden |