1. University of Virginia, Charlottesville, Virginia
2. Center for Value-Based Insurance Design and School of Public Health, University of Michigan, Ann Arbor, Michigan
3. Center for Healthcare Outcomes and Policy, University of Michigan, Ann Arbor, Michigan
4. Center for Healthcare Outcomes and Policy, School of Public Health, and Center for Evaluating Health Reform, University of Michigan, Ann Arbor, Michigan
5. Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts