1. 1VA Cooperative Studies Program, VA Boston Healthcare System, Boston, MA;
2. 2Department of Medicine, Stanford University School of Medicine, Stanford, CA
3. 3Division of Oncology, VA Palo Alto Healthcare System; Palo Alto, CA;
4. 4VA Boston Center for Healthcare Organization and Implementation Research (CHOIR), Boston, MA;
5. 5Department of Medicine, Harvard Medical School, Boston, MA;
6. 6Quantitative Sciences Unit, Stanford University School of Medicine, Stanford, CA;
7. 7Section of Hematology and Medical Oncology, Boston University School of Medicine, Boston, MA;
8. 8Section of General Internal Medicine, Boston University School of Medicine, Boston, MA;
9. 9Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA; and
10. 10Section of Hematology/Oncology, VA Boston Healthcare System, Boston, MA