1. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
2. Current affiliation: Oncology Center, Hospital Sírio-Libanês, Brasilia-DF, 70200-730, Brazil
3. Department of Biostatistics & Computational Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
4. Division of Hematology/Oncology, Kaiser Permanente, Walnut Creek, CA 94596, USA
5. Division of Surgical Oncology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
6. Division of Practice Management, American Society of Clinical Oncology, Alexandria, VA 22314, USA
7. Division of Medical Oncology & Hematology, Princess Margaret Cancer Centre, Toronto, ON M5G 2C1, Canada
8. Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA