1. Research Institute California Pacific Medical Center San Francisco CA USA
2. Department of Epidemiology and Biostatistics University of California San Francisco CA USA
3. Department of Medicine Oregon Health and Science University Portland OR USA
4. Department of Medicine Stanford University Stanford CA USA
5. Center for Care Delivery and Outcomes Research Minneapolis VA Health Care System Minneapolis MN USA
6. Division of Epidemiology and Community Health University of Minnesota Minneapolis MN USA
7. Department of Medicine University of Minnesota Minneapolis MN USA
8. Department of Epidemiology University of Pittsburgh Pittsburgh PA USA
9. Nutritional Sciences & Toxicology University of California Berkeley CA USA
10. Department of Medicine Duke University Durham NC USA