1. Department of Preventive Medicine, Northwestern University Feinberg School of Medicine , Chicago, Illinois , USA
2. Department of Epidemiology and Health Statistics, School of Public Health, Shanghai University of Traditional Chinese Medicine , Shanghai , China
3. UCSF Weill Institute for Neurosciences, University of California–San Francisco , San Francisco, California , USA
4. Department of Medicine, University of Minnesota , Minneapolis, Minnesota , USA
5. Minneapolis VA Health Care System, Minneapolis , Minnesota , USA
6. Department of Medicine, Harvard Medical School, Harvard University , Boston, Massachusetts , USA
7. Department of Laboratory Medicine and Pathology, University of Minnesota , Minneapolis, Minnesota , USA
8. Division of Epidemiology and Community Health, School of Public Health, University of Minnesota , Minneapolis, Minnesota , USA
9. Division of Research, Kaiser Permanente Northern California , Oakland, California , USA