1. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA;
2. Department of Medicine, Brigham and Women's Hospital, Boston, MA;
3. Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA;
4. Department of Medicine, Division of Medical Oncology, University of Washington School of Medicine, Seattle, WA;
5. Clinical Statistics Program, Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA;
6. Department of Biostatistics, University of Washington School of Public Health, Seattle, WA; and
7. Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston MA