1. Department of Cardiovascular Epidemiology and Research, The Danish Heart Foundation, Copenhagen, Denmark
2. Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Copenhagen, Denmark
3. Department of Health Research and Policy, Stanford University School of Medicine, Stanford, California
4. Department of Medicine, Stanford University, Stanford, California
5. Department of Management Science and Engineering, Stanford University, Stanford, California
6. VA Palo Alto Health Care System, Palo Alto, California
7. Stanford Health Policy, Centers for Health Policy and Primary Care and Outcomes Research, Stanford University, Stanford, California