1. Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium2Medical Oncology Clinic, Department of Medicine, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
2. Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
3. Department of Breast and Gynecological Surgery, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
4. Department of Pathology, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
5. Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark6Danish Breast Cancer Cooperative Group, Copenhagen, Denmark
6. Department of Pathology, European Institute of Oncology, University of Milan, Milan, Italy
7. Avera Cancer Institute, Sioux Falls, South Dakota
8. International Breast Cancer Study Group Statistical Center, Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, Massachusetts
9. International Breast Cancer Study Group Coordinating Center and Central Pathology Office, Bern, Switzerland
10. Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark6Danish Breast Cancer Cooperative Group, Copenhagen, Denmark11Department of Oncology, Odense University Hospital, Odense, Denmark12AgeCare, Odense University Hospital, Odense, Denmark
11. Medical Oncology Clinic, Department of Medicine, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
12. Service de Biostatistique et d’Epidémiologie, Gustave Roussy, Villejuif, France14INSERM U1018, CESP, Université Paris-Sud, Villejuif France