1. Centre for Clinical Research, Region Värmland, 651 85 Karlstad, Sweden
2. Department of Public Health Sciences, Karlstad University, 651 88 Karlstad, Sweden
3. Department of Knowledge Management and Patient Safety, Region Värmland, 651 82 Karlstad, Sweden
4. Institute of Medical Sciences, Örebro University, 701 82 Örebro, Sweden