1. Philip R. Lee Institute for Health Policy Studies, University of California School of Medicine, San Francisco
2. Department of Family & Community Medicine, University of California School of Medicine, San Francisco
3. Department of Clinical Epidemiology, Aarhus University, Denmark
4. Center for Population Health Science, Stanford University, Stanford, California
5. Department of Cardiology, Aarhus University Hospital, Denmark
6. Department of Epidemiology & Biostatistics, University of California School of Medicine, San Francisco