1. 1Breast Cancer Now Research Centre, The Institute of Cancer Research, London, United Kingdom.
2. 2Breast Unit, Royal Marsden Hospital, London, United Kingdom.
3. 3Medical Oncology Intercenter Unit, Regional and Virgen de la Victoria University Hospitals, IBIMA, Málaga, Spain.
4. 4GEICAM Spanish Breast Cancer Group, Madrid, Spain.
5. 5Oncology Biomedical Research National Network (CIBERONC-ISCIII), Madrid, Spain.
6. 6Institut Català d'Oncologia (ICO), Barcelona, Spain.
7. 7IDIBELL, L'Hospitalet, Barcelona, Spain.
8. 8Medical Oncology, Central European Cancer Center, Wiener Privatklinik Hospital, Vienna, Austria.
9. 9CECOG Central European Cooperative Oncology Group, Vienna, Austria.
10. 10Medical Oncology, Hospital Universitario Virgen del Rocio, Sevilla, Spain.
11. 11Medical Oncology, Hospital Universitario 12 de Octubre, Madrid, Spain.
12. 12Department of Medical Oncology and Translational Genomics and Targeted Therapies in Solid Tumors, IDIBAPS, Barcelona, Spain.
13. 13Ralph Lauren Centre for Breast Cancer Research, London, United Kingdom.
14. 14Medical Oncology, Hospital Clínico Universitario de Valencia, Biomedical Research Institute INCLIVA, Valencia, Spain.
15. 15Medicine Department, Universidad de Valencia, Valencia, Spain.
16. 16B-ARGO Group, Catalan Institute of Oncology-Badalona, Hospital Universitari Germans Trias i Pujol, Badalona, Spain.
17. 17Medical Oncology, Hospital Universitario Miguel Servet, Medicine Department, Universidad de Zaragoza, Instituto de Investigación Sanitaria Aragón, Zaragoza, Spain.
18. 18Department of Oncotherapy, University of Szeged, Szeged, Hungary.
19. 19Jász-Nagykun-Szolnok Megyei Hetényi Géza Kórház-Rendelőintézet, Szolnok, Hungary.
20. 20Pfizer, La Jolla, San Diego, California.
21. 21Medical Oncology, Instituto de Investigación Sanitaria Gregorio Marañón, Medicine Department, Universidad Complutense, Madrid, Spain.