1. Department of Radiology, Mayo Clinic, Arizona, 5777 E Mayo Blvd PX_MH_01_RAD, Phoenix, AZ 85054.
2. Department of Medicine, Mayo Clinic Scottsdale, Scottsdale, AZ.
3. Department of Laboratory Medicine, Division of Anatomic Pathology, Mayo Clinic Scottsdale, Scottsdale, AZ.
4. Southwest Medical Imaging, Scottsdale, AZ.