1. Department Medical Oncology, Netherlands Cancer Institute Amsterdam and University Medical Center Groningen , The Netherlands
2. Dutch Breast Cancer Trialists’ Research Group (BOOG) , The Netherlands
3. Breast Unit, Champalimaud Clinical Center/Champalimaud Foundation , Lisbon , Portugal
4. Department of Oncologym , Sahlgrenska University Hospital, Gothenburg, Sweden and Swedish Association of Breast Oncologists (SABO) , Sweden
5. European Organisation for Research and Treatment of Cancer (EORTC) Headquarters , Brussels , Belgium
6. Department of Medical Oncology, Johns Hopkins , Baltimore, MD , USA
7. Breast Unit, Helios University Clinic, Wuppertal, University Witten/Herdecke , Germany
8. Latin American Cooperative Oncology Group , Porto Alegre , Brazil
9. Department of Medical Oncology, Portuguese Institute of Oncology of Porto , Porto , Portugal
10. Department of Medical Oncology, Institute of Oncology and Radiology , Belgrade , Serbia
11. Department of Medical Oncology, Elisabeth-TweeSteden Ziekenhuis , Tilburg , The Netherlands
12. Department of Medical Oncology, Isala , Zwolle , The Netherlands
13. Department of Medical Oncology, St. Antonius Ziekenhuis , Utrecht , The Netherlands
14. Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School , Boston, MA , USA
15. Department of Radiotherapy, Netherlands Cancer Institute – Antoni van Leeuwenhoek , Amsterdam , The Netherlands
16. Department of Medical Oncology, Jeroen Bosch Ziekenhuis’s Hertogenbosch , The Netherlands
17. Department of Medical Oncology, Martini Ziekenhuis , Groningen , The Netherlands
18. Department of Medical Oncology, University of Michigan , Ann Arbor, MI , USA
19. Department of Medical Oncology, Waterlandziekenhuis , Purmerend , The Netherlands
20. Department of Medical Oncology, University of Washington and Fred Hutchinson Cancer Research Center , Seattle, WA , USA
21. Department of Health Services Research and Department of Breast Medical Oncology, MD Anderson Cancer Center , Houston, TX , USA
22. Department of Oncology, Mayo Clinic , Rochester, MN , USA