1. Department of Community Medicine; Faculty of Health Sciences; UiT-The Arctic University of Norway; Tromsø Norway
2. Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
3. Department of Research; Cancer Registry of Norway; Institute of Population-Based Cancer Research; Oslo Norway
4. Genetic Epidemiology Group; Folkhälsan Research Center, and Faculty of Medicine; University of Helsinki; Helsinki Finland