1. Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine, University of California, Los Angeles
2. Graduate School of Business Administration, Keio University, Yokohama, Japan
3. Graduate School of Health Management, Keio University, Tokyo, Japan
4. Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts
5. Department of Medicine, Massachusetts General Hospital, Boston
6. National Bureau of Economic Research, Cambridge, Massachusetts
7. Department of Health Policy and Management, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
8. Division of General Internal Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
9. Department of Medicine, Harvard Medical School, Boston, Massachusetts
10. Department of Health Policy and Management, Fielding School of Public Health, University of California, Los Angeles