Letters to the Editor

Affiliations

• ¹ Department of Radiology, University of Illinois Hospital and Health Sciences System, 1740 W Taylor Street, Mail Code 931, Chicago, IL 60612; Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California.
• ² Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California.