1. Norwegian Scientific Committee for Food and Environment Norwegian Institute of Public Health Oslo Norway
2. Department of Chronic Diseases and Ageing Norwegian Institute of Public Health Oslo Norway
3. Department of Pediatrics Stavanger University Hospital Stavanger Norway
4. Department of Clinical Science University of Bergen Norway
5. Department of Public Health and Nursing Norwegian University of Science and Technology Trondheim Norway
6. Department of Community Medicine and Public Health University of Oslo Oslo Norway
7. Health Services Research Unit Akershus University Hospital Lørenskog Norway
8. Department of Method Development and Analytics Norwegian Institute of Public Health Oslo Norway