1. Department of Radiology, Center for Evidence-Based Imaging, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St, Boston, MA 02115.
2. Division of Rheumatology, Immunology, and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.
3. Department of Quality and Safety, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.
4. Department of Psychiatry, Boston University School of Medicine, Boston, MA.
5. Department of Radiology, Brigham and Women's Hospital, Boston, MA.