1. Faculty of Social and Health Sciences, Department of Health Studies, Inland Norway University of Applied Science, Elverum, Norway
2. Faculty of Health, Science and Technology, Department of Health Science, Karlstad University, Karlstad, Sweden
3. County Council of Värmland, Centre for Clinical Research, Karlstad, Sweden
4. Faculty of Medicine and Health, University Health Care Research Center, Örebro University, Örebro, Sweden