1. Department of Radiology and Imaging Sciences, Division of Emergency and Trauma Imaging, Emory University Mid-town Hospital, 550 Peachtree Rd, Atlanta, GA 30308
2. Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, GA
3. Radiology Associates of North Texas, Fort Worth, TX
4. Harvey L. Neiman Health and Policy Institute, Reston, VA
5. Department of Radiology, WellSpan Chambersburg Hospital, Chambersburg, PA
6. School of Economics, Georgia Institute of Technology, Atlanta, GA