1. Department of Health Management and Policy, School of Public Health, University of Michigan, Ann Arbor, Michigan, USA
2. Department of Economics, University of Michigan, Ann Arbor, Michigan, USA
3. Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor, MI, USA
4. Maxwell School of Citizenship & Public Affairs, Syracuse University
5. Department of Internal Medicine, University of Chicago, Chicago, IL, USA
6. Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA