1. Department of University Healthcare Research Centre; Faculty of Medicine and Health; Örebro University; Örebro Sweden
2. Centre for Clinical Research; County Council of Värmland; Karlstad Sweden
3. Department of Medical Sciences, Lung Allergy and Sleep Research; Uppsala University; Uppsala Sweden
4. School of Medical Sciences; Örebro University; Orebro Sweden
5. Department of Public Health and Caring Sciences; Family Medicine and Preventive Medicine; Uppsala University; Uppsala Sweden