1. Department of Radiology and Biomedical Imaging, Epidemiology and Biostatistics, and Philip R. Lee Institute for Health Policy Studies, University of California, San Francisco
2. Division of Research, Kaiser Permanente Northern California, Oakland
3. Department of Public Health Sciences, University of California, Davis
4. Graduate Group in Epidemiology, University of California, Davis
5. Kaiser Permanente Washington Health Research Institute, Seattle
6. J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville
7. ICES, Toronto, Ontario, Canada
8. Interventional Radiology Section, Washington University in St Louis, St Louis, Missouri
9. Marshfield Clinic Research Institute, Marshfield, Wisconsin
10. Pediatric Oncology Group of Ontario and Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
11. Center for Health Research, Genomic Medical Institute, Geisinger, Danville, Pennsylvania
12. Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts
13. Center for Health Research, Kaiser Permanente Northwest, Portland, Oregon