Affiliation: | 1. Department of Radiology, Naval Medical Center San Diego, 34800 Bob Wilson Drive, Suite 204, San Diego, CA 92134, USA;2. Department of Radiology, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA;3. Department of Radiology, University of California San Diego, 200 West Arbor Drive, San Diego, CA 92103, USA;4. Department of Radiology, Duke University, Box 3808, Durham, NC 27710, USA |