1 Interventional Radiology, Mallinckrodt Institute of Radiology, Washington University St. Louis School of Medicine, 510 S Kingshighway Boulevard, Campus Box 8131, St Louis, MO 63110. Electronic address: Daniel.Crawford@wustl.edu.
2 Musculoskeletal Radiology, Mallinckrodt Institute of Radiology, Washington University St. Louis School of Medicine, St. Louis, MO.