1. Department of Health, SINTEF Technology and Society, Trondheim, Norway;
2. Department of Health Economics and Financing, The Norwegian Directorate of Health, Trondheim, Norway;
3. Department of Economics, Norwegian University of Science and Technology, Trondheim, Norway;
4. Division of Mental Health Services, Akershus University Hospital, Lørenskog, Norway;
5. Institute of Clinical Medicine, University of Oslo, Oslo, Norway;
6. TS Social and Behavioral Sciences, Tilburg University, Utrecht, The Netherlands