1 Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania. Electronic address: [email protected].
2 Department of Radiology, University of Washington School of Medicine, Seattle, Washington; Department of Health Systems & Population Health, University of Washington School of Public Health, Seattle, Washington; Fred Hutchinson Cancer Center, Seattle, Washington; Director of the Northwest Screening and Cancer Outcomes Research Enterprise at the University of Washington; and Deputy Editor of JACR.