1. Department of Radiology, UCSD Medical Center, 200 W Arbor Dr, MC 8756, San Diego, CA 921023.
2. Department of Radiology, University of Pennsylvania, Philadelphia, PA.
3. Department of Radiology, University of North Carolina, Chapel Hill, NC.
4. Department of Radiology, Icahn School of Medicine, Mount Sinai Hospital, New York, NY.
5. Department of Radiology, University of Minnesota, Minneapolis, MN.