1. Division of Climate and Environmental Health Norwegian Institute of Public Health Oslo Norway
2. Department of Occupational Medicine and Epidemiology National Institute of Occupational Health Oslo Norway
3. Division for Health Services Norwegian Institute of Public Health Oslo Norway
4. Cancer Registry of Norway Oslo Norway
5. Division of Pediatric and Adolescent Medicine Oslo University Hospital Oslo Norway
6. Institute of Clinical Medicine, Faculty of Medicine University of Oslo Oslo Norway
7. Department of Dermatology Oslo University Hospital Oslo Norway
8. VID Specialized University Oslo Norway
9. Nordic Institute of Dental Materials Oslo Norway