1. Kaiser Permanente Northwest, Portland, OR
2. Kaiser Permanente Colorado, Denver, CO
3. Kaiser Permanente Southern California, Pasadena, CA
4. Kaiser Permanente Vaccine Study Center, Oakland, CA
5. Kaiser Permanente Washington, Seattle, WA
6. Marshfield Clinic, Marshfield, WI
7. Harvard Pilgrim Health Care Institute, Boston, MA
8. Yale School of Medicine, New Haven, CT
9. HealthPartners Institute, Bloomington, MN