Institution: | 1. Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts;3. Kaiser Permanente Division of Research, Oakland, California;4. Kaiser Permanente Northern California, Regional Pharmacy, Oakland, California;6. Kaiser Permanente South San Francisco Medical Center, South San Francisco, California;5. Kaiser Permanente Northern California, Medical Group Support Services, Oakland, California;7. Kaiser Permanente San Rafael Medical Center, San Rafael, California;12. Kaiser Permanente Sacramento Medical Center, Sacramento, California;8. Kaiser Permanente Santa Clara Medical Center, Santa Clara, California;10. Kaiser Permanente Antioch Medical Center, Antioch, California; Kaiser Permanente Walnut Creek Medical Center, Walnut Creek, California |