| Affiliation: | 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 |
