1. 1Section of Hematology and Medical Oncology, Boston University and Boston Medical Center, Boston, Massachusetts, USA
2. 2Alliance Statistics and Data Management Center and Mayo Clinic Cancer Center, Rochester, Minnesota, USA
3. 3Department of Biostatistics, Duke Cancer Center, Durham, North Carolina, USA
4. 4Yale Cancer Center, New Haven, Connecticut, USA
5. 5Virginia Mason Cancer Institute, Seattle, Washington, USA
6. 6Tisch Cancer Institute, New York, New York, USA
7. 7Dana-Farber Cancer Institute, Boston, Massachusetts, USA
8. 8Memorial Sloan Kettering Cancer Center, New York, New York, USA
9. 9UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA