1. Vårdalinstitutet Swedish Institute for Health Sciences
2. Department of Clinical Neuroscience and Rehabilitation
3. Hospital of Södra Älvsborg Borås Sweden
4. Department of Public Health Community Medicine, and Social Medicine
5. Danish Institute for Health Services Research
6. Health Economics Unit Institute of Public Health University of Southern Denmark Copenhagen Denmark
7. Department of Clinical Nutrition Institute of Medicine Sahlgrenska Academy University of Gothenburg Gothenburg