1. Departments of Medicine and Health Research and Policy, Stanford University, Stanford, California
2. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia
3. Department of Preventive Medicine in the Keck School of Medicine, Keck School of Medicine, University of Southern California, Los Angeles
4. Department of Biostatistics, School of Public Health, University of Michigan, Ann Arbor
5. Department of Internal Medicine, Division of General Medicine, Department of Health Management and Policy, School of Public Health, University of Michigan, Ann Arbor, and Veterans Administration Center for Clinical Management Research, Ann Arbor VA Health Care System, Ann Arbor
6. Memorial Sloan-Kettering Cancer Center, Department of Surgery, New York, New York
7. Center for Bioethics and Social Science in Medicine, Oncology, Department of Radiation, University of Michigan, Ann Arbor
8. Department of Health Management and Policy, School of Public Health, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan