1. The University of Texas MD Anderson Cancer Center, Houston
2. Dana-Farber Cancer Institute, Boston, Massachusetts
3. Memorial Sloan Kettering Cancer Center, New York, New York
4. Duke Cancer Institute, Durham, North Carolina
5. University of California, San Francisco
6. University of Leeds and Leeds Teaching Hospitals Trust, Leeds, England
7. Centre Eugène Marquis, Rennes, France
8. University Medical Center Hamburg-Eppendorf, Hamburg, Germany
9. Nektar Therapeutics, San Francisco, California
10. International Breast Cancer Center, Quironsalud Group, Barcelona, Spain
11. Vall d’Hebron Institute of Oncology, Barcelona, Spain
12. for the ATTAIN Investigators