1. Department of Radiology, Baylor College of Medicine, Houston, TX.
2. Department of Radiology, Mayo Clinic Arizona, Scottsdale, AZ.
3. Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI.
4. Department of Radiology, University of Utah, Salt Lake City, UT.
5. Department of Diagnostic Radiology, University of Missouri–Columbia, Columbia, MO.
6. Department of Radiology, The University of Texas M D Anderson Cancer Center, 1400 Pressler St, Houston, TX 77030.