1. University of Michigan Health System, University of Michigan, Ann Arbor, Michigan.
2. Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan.
3. Department of History and Health Management and Policy, University of Michigan, Ann Arbor, Michigan.
4. Department of Radiology & Imaging Sciences, Emory University, Atlanta, Georgia.
5. Family Medicine, University of Michigan, Ann Arbor, Michigan.
6. Department of Family and Community Medicine, University of Cincinnati, Cincinnati, Ohio.