1. Department of Imaging, Dana-Farber Cancer Institute, 450 Brookline Ave, Boston, MA 02215.
2. Department of Radiology, Brigham and Women's Hospital, Boston, MA.
3. Department of Radiology, Harvard Medical School, Boston, MA.
4. Department of Radiology, Beth Israel Lahey Health, Tufts University School of Medicine, Boston, MA.
5. Department of Radiology, Cary Medical Center, Caribou, ME.