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. Oregon Health & Science University, Portland
7. Columbia University, New York, New York
8. University of Pennsylvania, Philadelphia
9. Virginia Tech Carilion School of Medicine, Roanoke
10. Nationwide Children’s Hospital, Columbus, Ohio
11. Fairfax Family Practice Residency, Fairfax, Virginia
12. Virginia Commonwealth University, Richmond
13. Temple University, Philadelphia, Pennsylvania
14. University of Alabama at Birmingham
15. University of California, Los Angeles
16. University of Texas at Austin
17. Boston University, Boston, Massachusetts
18. Northwestern University, Evanston, Illinois
19. University of Hawaii, Honolulu
20. Pacific Health Research and Education Institute, Honolulu, Hawaii