1. Department of Epidemiology and Statistics, University of California, San Francisco
2. Kaiser Permanente Division of Research, Oakland, California
3. Now with Kaiser Permanente Research Bank, Oakland, CA
4. Department of Clinical Pharmacy, University of California, San Francisco
5. Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles
6. Department of Public Health Sciences, University of California, Davis
7. Department of Epidemiology, George Washington University Milken Institute School of Public Health, Washington, District of Columbia
8. Department of Epidemiology, Boston University, Boston, Massachusetts