1. HealthPartners Institute for Education and Research; Minneapolis Minnesota
2. Wake Forest School of Medicine; Winston-Salem North Carolina
3. Department of Research & Evaluation; Kaiser Permanente Southern California; Pasadena California
4. Group Health Research Institute; Seattle Washington
5. Meyers Primary Care Institute; Worcester Massachusetts
6. Lovelace Respiratory Research Institute; Albuquerque New Mexico
7. Dana-Farber Cancer Institute, Phyllis F. Cantor Center; Boston Massachusetts
8. Section of Geriatrics; Boston University School of Medicine, Boston Medical Center; Boston Massachusetts
9. Massachusetts Veterans Epidemiology Research and Information Center, Veterans Affairs Healthcare System; Boston Massachusetts