1. Faculty of Health Sciences, Department of Health, Nutrition and Management; Oslo and Akershus University College of Applied Sciences; Oslo Norway
2. Division for Health Services; Norwegian Institute of Public Health, Oslo/Western Norway University of Applied Sciences, Centre for Evidence Based Practice; Bergen Norway
3. Department of Medicine; University of Otago; Dunedin New Zealand
4. Oslo University Hospital, Division of Medicine, Department of Clinical Services; Section of Nutrition and Dietetics/Faculty of Medicine, Institute of Clinical Medicine, University of Oslo; Oslo Norway