1. Division of General Medicine; Department of Internal Medicine; School of Medicine; University of Michigan; Ann Arbor Michigan
2. Center for Healthcare Outcomes and Policy; University of Michigan; Ann Arbor Michigan
3. Institute for Healthcare Policy and Innovation; University of Michigan; Ann Arbor Michigan
4. Veterans Affairs Ann Arbor Healthcare System; Ann Arbor Michigan
5. Department of Health Management and Policy; School of Public Health; University of Michigan; Ann Arbor Michigan
6. Department of Economics; University of Michigan; Ann Arbor Michigan
7. National Bureau of Economic Research; Cambridge Massachusetts
8. Institute for Social Research; University of Michigan; Ann Arbor Michigan
9. Department of Health Policy and Management; Harvard School of Public Health; Boston Massachusetts
10. Division of General Internal Medicine; Brigham and Women's Hospital and Harvard Medical School; Boston Massachusetts