1. Department of Radiology, Division of Musculoskeletal Imaging, Mayo Clinic, 200 2nd St SW, Rochester, MN 55902.
2. Department of Radiology, Division of Medical Physics, Mayo Clinic, Rochester, MN.
3. Department of Radiology, Mayo Clinic, Rochester, MN.
4. Department of Medicine, Division of Rheumatology, Mayo Clinic, Rochester, MN.
5. Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN.
6. Department of Radiology, Division of Abdominal Imaging, Mayo Clinic, Rochester, MN.