1. 1Laboratory for Translational Breast Cancer Research, Department of Oncology, KU Leuven, Leuven, Belgium.
2. 2Department of Pathology, University Hospitals Leuven, Leuven, Belgium.
3. 3Department of Gynecological and Obstetrics, University Hospitals Leuven, Leuven, Belgium.
4. 4Department of Medical Oncology, Institut Curie, Saint Cloud, France.
5. 5Department of Medical Oncology, Centre Henri Becquerel, Rouen, France.
6. 6Anatomical Pathology Unit, Department of Biopathology, Centre Henri Becquerel, Rouen, France.
7. 7Department of Internal Medicine and Medical Specialties (DiMI), School of Medicine, University of Genova, Genova, Italy.
8. 8Department of Medical Oncology, U.O. Clinica di Oncologia Medica, IRCCS Ospedale Policlinico San Martino, Genova, Italy.
9. 9Anatomical Pathology Unit, Department of Surgical Sciences and Integrated Diagnostics, University of Genova, Genoa, Italy.
10. 10Department of Internal Medicine and Specialistic Medicine, U.O. Medicina Interna a Indirizzo Oncologico, IRCCS Ospedale Policlinico San Martino, Genova, Italy.
11. 11Translational Cancer Research Unit, Center for Oncological Research, Faculty of Medicine and Health Sciences, University of Antwerp, GZA hospitals, Antwerp, Belgium.
12. 12Department of General Medical Oncology, University Hospitals Leuven, Leuven, Belgium.
13. 13Department of Surgical Oncology, University Hospitals Leuven, Leuven, Belgium.
14. 14Department of Gynecological Oncology, University Hospitals Leuven, Leuven, Belgium.
15. 15Department of Pathology, Université Paris Sciences Lettres, Institut Curie, Paris, France.
16. 16Department of Pathology, Institut Jules Bordet, Brussels, Belgium.
17. 17Clinique du sein, Centre Hospitalier du Luxembourg, Luxembourg.
18. 18Institut Paoli-Calmettes, Marseille, France.
19. 19Unit of Medical Statistics, Biometry and Epidemiology, Department of Biomedical and Clinical Sciences (DIBIC) “L. Sacco” & DSRC, LITA Vialba campus, University of Milan, Milan, Italy.
20. 20Laboratory for Translational Cell and Tissue Research, Department of Pathology and Imaging, KU Leuven, Belgium.