1. Uppsala University, Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine Section, Uppsala, Sweden;
2. Uppsala University, Centre for Clinical Research Sörmland, Eskilstuna, Sweden;
3. Mälardalen University, School of Health, Care and Social Welfare, Västerås, Sweden;
4. Uppsala University, Department of Public Health and Caring Sciences, Health Services Research Section, Uppsala, Sweden