1. Kaiser Permanente Washington Health Research Institute, Seattle
2. University of Iowa, Iowa City
3. Veterans Affairs Palo Alto Health Care System, Palo Alto, California
4. Stanford University, Stanford, California
5. Harvard Medical School, Boston, Massachusetts
6. Columbia University, New York, New York
7. University of Pennsylvania, Philadelphia
8. Virginia Tech Carilion School of Medicine, Roanoke
9. Nationwide Children’s Hospital, Columbus, Ohio
10. Fairfax Family Practice Residency, Fairfax, Virginia
11. Virginia Commonwealth University, Richmond
12. Yale University, New Haven, Connecticut
13. University of Alabama at Birmingham
14. University of California, Los Angeles
15. Brown University, Providence, Rhode Island
16. Boston University, Boston, Massachusetts
17. Northwestern University, Evanston, Illinois
18. University of Hawaii, Honolulu
19. Pacific Health Research and Education Institute, Honolulu, Hawaii