1. Department of Radiology, Duke University Medical Center, Box 3808, Durham, NC 27710.
2. Department of Radiology, Massachusetts General Hospital, Boston, MA.
3. Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Lenox Hill Hospital-Northwell Health, New York, NY.
4. Department of Radiology, University of Cincinnati, Cincinnati, OH.
5. Medical Imaging Department, Sutter Health, Sacramento, CA.
6. Department of Radiology, University of California Davis School of Medicine, Sacramento, CA.
7. Department of Radiology, University of Vermont Medical Center, Burlington, VT.