1. Group Health Research Institute, Seattle, Washington
2. Kaiser Permanente Colorado Institute for Health Research, Denver
3. Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts
4. University of Colorado School of Medicine, Aurora
5. Kaiser Permanente Georgia Center for Health Research Southeast, Atlanta
6. University of Colorado School of Medicine, Aurora6Colorado Permanente Medical Group, Aurora
7. Kaiser Permanente Division of Research, Oakland, California
8. University of Hawai'i at Manoa, Honolulu
9. Kaiser Permanente Hawaii Center for Health Research, Honolulu
10. Kaiser Permanente, Oakland, California