1. Meyers Primary Care Institute, a joint endeavor of University of Massachusetts Medical SchoolReliant Medical Group, and Fallon Health Worcester Massachusetts
2. Division of Geriatric Medicine, Department of MedicineUniversity of Massachusetts Medical School Worcester Massachusetts
3. Department of Quantitative Health SciencesUniversity of Massachusetts Medical School Worcester Massachusetts
4. Division of ResearchKaiser Permanente Northern California Oakland California
5. Department of Research and EvaluationKaiser Permanente Southern California Pasadena California
6. Center for Health ResearchKaiser Permanente Northwest Oregon Portland
7. The Kaiser Institute for Health Research Denver Denver Colorado
8. Section of Geriatrics, Department of Internal MedicineSchool of Medicine, Yale University New Haven Connecticut
9. Departments of Epidemiology and BiostatisticsUniversity of California, San Francisco San Francisco California
10. Departments of MedicineUniversity of California, San Francisco San Francisco California
11. Department of Health Research and PolicySchool of Medicine, Stanford University Stanford California