Institution: | (1) Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA;(2) Department of Radiology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA;(3) Department of Surgery, Division of Cardiothoracic Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA;(4) Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA;(5) Present address: Department of Neurosurgery and Radiology, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Blvd., 75235 Dallas, TX, USA |