1. Kaiser Permanente Center for Health Research, Portland, Oregon
2. Moffitt Cancer Center and Research Institute, Tampa, Florida
3. University of Arizona School of Medicine, Tucson, Arizona
4. Corporal Michael J. Crescenz Veterans Administration Medical Center and Department of Surgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
5. City of Hope/Beckman Research Institute, Duarte
6. Department of Research and Evaluation, Kaiser Permanente, Pasadena
7. Division of Research, Kaiser Permanente, Oakland, California