1. Health Centre Läkarhuset Unicare, Borlänge, Sweden; Centre of Clinical Research (CKF), Dalarna, Sweden
2. Department of Internal Medicine/Respiratory Medicine and Allergology, University of Gothenburg, Sweden
3. Department of Medical Science, Sophiahemmet University, Sweden
4. Department of Health Sciences, Karlstad University, Sweden
5. The School of Education, Health and Social Studies, Dalarna University, Sweden