1. Department of Research and Evaluation, Kaiser Permanente Southern California, Pasadena, California;
2. Departments of Biostatistics and Bioinformatics and
3. Epidemiology, Rollins School of Public Health, and
4. Center for Clinical and Outcomes Research, Kaiser Permanente Georgia, Atlanta, Georgia;
5. Rockway Institute, Alliant International University, San Francisco, California;
6. Division of Research, Kaiser Permanente, Northern California, Oakland, California;
7. Mid-Atlantic Permanente Research Institute, Kaiser Permanente Mid-Atlantic States, Rockville, Maryland;
8. Department of Pediatrics, Medical School, University of Michigan, Ann Arbor, Michigan; and
9. Emory School of Medicine, Emory University, Atlanta, Georgia;
10. Atlanta Veterans Affairs Medical Center, Atlanta, Georgia