1. Division of General Internal Medicine, Department of Medicine, Medical Effectiveness Research Center for Diverse Populations, University of California, San Francisco, California.
2. Division of General Internal Medicine, Department of Medicine, Medical Effectiveness Research Center for Diverse Populations, and Comprehensive Cancer Center, University of California, San Francisco, California.
3. Division of General Medicine and Primary Care, Department of Medicine Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.
4. Comprehensive Cancer Center, University of California, San Francisco, California.