1. Department of Health Behavior and Health Education, University of Michigan, School of Public Health, Ann Arbor, Michigan.
2. Department of Epidemiology, University of Michigan, School of Public Health, Ann Arbor, Michigan.
3. Department of Health Management and Policy, University of Michigan, School of Public Health, Ann Arbor, Michigan.
4. Division of General Medicine, Department of Internal Medicine, University of Michigan Health System, Ann Arbor, Michigan.
5. Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan.
6. Department of Surgical Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania.
7. Department of Family Medicine and Karmanos Cancer Institute, Wayne State University, Detroit, Michigan.