1. Yale School of Medicine, New Haven, Connecticut, USA
2. Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, Connecticut, USA
3. Yale School of Management, New Haven, Connecticut, USA
4. Department of Health Policy and Management, Yale School of Public Health, New Haven, Connecticut, USA
5. Crowell and Moring LLP, Health Care Group, Washington, District of Columbia, USA
6. Section of Cardiovascular Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut, USA
7. Center for Outcomes Research and Evaluation, Yale-New Haven Hospital, New Haven, Connecticut, USA