1. Park Nicollet Clinic and HealthPartners Institute, HealthPartners, Bloomington, and Division of Health Policy and Management, University of Minnesota, Minneapolis, Minnesota (J.T.S.)
2. Departments of Surgery and Radiology, The University of Vermont, Burlington, Vermont (B.L.S.)
3. Kaiser Permanente Washington Health Research Institute, Seattle, Washington (L.A., E.S.O., K.J.W.)
4. Department of Population Health Sciences and Huntsman Cancer Institute, The University of Utah, Salt Lake City, Utah (T.O.)
5. Department of Oncology, School of Medicine, Georgetown University, Washington, DC, and Terasaki Institute for Biomedical Innovation, Los Angeles, California (S.A.)
6. Department of Radiology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (L.M.H.)
7. Cancer Control and Population Sciences Program and Department of Epidemiology, University of Florida, Gainesville, Florida (D.Z.)
8. Department of Public Health Sciences, University of California, Davis, California, and Kaiser Permanente Washington Health Research Institute, Seattle, Washington (D.L.M.)
9. Cancer Control and Population Sciences Program, Department of Epidemiology, and Institute on Aging, University of Florida, Gainesville, Florida (D.B.)
10. Departments of Medicine and Epidemiology and Biostatistics and Department of Veterans Affairs (VA) Division of General Internal Medicine, University of California, San Francisco, San Francisco, California (K.K.).