1. Department of Radiology, Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115.
2. Quantitative Health Science, Cleveland Clinic Foundation, Cleveland, OH.
3. Department of Radiology, Duke University School of Medicine, Durham, NC.
4. The George Washington Cancer Center, George Washington University, Washington, DC.
5. Departments of Radiology and Surgery, State University of New York at Stony Brook Health Science Center, Stony Brook, NY.
6. Imaging Institute, Cleveland Clinic Foundation, Cleveland, OH.
7. Department of Radiology, Stony Brook Medicine, Stony Brook, NY.
8. Department of Radiology and Imaging Sciences, University of Utah School of Medicine, Salt Lake City, UT.
9. Diagnostic Imaging, X-Ray Products, Siemens Healthcare GmbH, Forchheim, Germany.