1. Faculty of Social Sciences, Tampere University, Tampere, Finland;
2. Women-Mother-Child Department, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland;
3. Department of Research, Cancer Registry of Norway, Institute of Population-Based Cancer Research, Oslo, Norway;
4. Nykøbing Falster Hospital, University of Copenhagen, Denmark;
5. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden;
6. Icelandic Cancer Registry, Reykjavik, Iceland;
7. Faculty of Medicine, University of Iceland, Reykjavik, Iceland;
8. International Agency for Research on Cancer, World Health Organization, Lyon, France;
9. Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer Research, Helsinki, Finland