1. Närhälsan Bollebygd Health Care Centre, Bollebygd, Sweden
2. Primary Health Care, School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
3. Centre of Registers Västra Götaland, Gothenburg, Sweden
4. Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Sweden
5. Department of Emergency Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden
6. Regionhälsan R&D Centre, Skaraborg Primary Care, Skövde, Sweden