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1Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
2Department of Research, Cancer Registry of Norway, Institute of Population-Based Cancer Research, Oslo, Norway
3Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
4Department of Medicine, Karolinska Institutet, Stockholm, Sweden
5Department of Community Medicine, Faculty of Health Science, University of Tromsø, The Arctic University of Norway, Tromsø, Norway
6Genetic Epidemiology Group, Folkhälsan Research Center, Helsinki, Finland
© 2016, Korean Society of Epidemiology
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