Institution: | (1) Division of Interventional Neuroradiology, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO, USA;(2) Barnes-Jewish Hospital, Washington University School of Medicine, St. Louis, MO, USA;(3) Present address: Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA;(4) Washington University School of Medicine, Box 8131, 510 S Kingshighway Boulevard, St. Louis, MO 63110, USA |