1. Department of Genetics; Institute for Cancer Research; Oslo University Hospital Radiumhospitalet; Oslo Norway
2. The K.G. Jebsen Center for Breast Cancer Research; Institute for Clinical Medicine; Faculty of Medicine; University of Oslo; Norway
3. Laboratory for Epigenetics and Environment; Centre National de Génotypage; CEA-Institut de Génomique; 91000 Evry France
4. Department of Oncology; Oslo University Hospital Radiumhospitalet; Oslo Norway
5. Department of Clinical Molecular Biology (EpiGen); Medical Division, Akershus University Hospital; Lørenskog Norway