1. University of Pittsburgh; Pittsburgh PA USA
2. California Pacific Medical Center Research Institute; San Francisco CA USA
3. University of California; San Francisco; San Francisco CA USA
4. Division of Epidemiology and Community Health; University of Minnesota; Minneapolis MN USA
5. Department of Medicine; University of Minnesota; Minneapolis MN USA
6. Center for Chronic Disease Outcomes Research; VA Health Care System; Minneapolis MN USA
7. University of Alabama at Birmingham; Birmingham AL USA
8. Stanford University; Stanford CA USA
9. University of California; Davis, Davis CA USA
10. University of California; San Diego, San Diego CA USA
11. Oregon Health & Science University; Portland OR USA