1. Center for Outcomes Research and Evaluation, Yale New Haven Hospital, New Haven, Connecticut
2. Section of Cardiovascular Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut
3. Department of Health Policy and Management, Yale School of Public Health, New Haven, Connecticut
4. Section of General Internal Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut
5. Section of General Pediatrics, Department of Pediatrics, Yale School of Medicine, New Haven, Connecticut
6. Department of Biostatistics, Harvard T.H. Chan School of Public Health, Harvard University, Boston, Massachusetts
7. Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts