1. Division of Oncology, Stanford University School of Medicine, Stanford, California
2. Medical Services, Veterans Affairs Palo Alto Health Care System, Palo Alto, California
3. Center for Primary Care and Outcomes Research/Health Research and Policy, Stanford University School of Medicine, Stanford, California
4. Quantitative Sciences Unit, Stanford University School of Medicine, Stanford, California
5. Providence Medical Foundation, Fullerton, California
6. St Jude Crosson Cancer Institute, Center for Hematology and Oncology, Fullerton, California