1. Kaiser Permanente Division of Research, Oakland, California, USA
2. Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts, USA
3. Kaiser Permanente Northern California Regional Pharmacy, Oakland, California, USA
4. Kaiser Permanente South San Francisco Medical Center, South San Francisco, California, USA
5. Kaiser Permanente Oakland Medical Center, Oakland, California, USA
6. Kaiser Permanente San Rafael Medical Center, San Rafael, California, USA
7. Kaiser Permanente Santa Clara Medical Center, Santa Clara, California, USA
8. Kaiser Permanente Antioch Medical Center, Antioch, California
9. Kaiser Permanente Walnut Creek Medical Center, Walnut Creek, California, USA