[1] Univ Kentucky, Dept Neurosurg, Lexington, KY USA
[2] Univ Tennessee, Hlth Sci Ctr, Dept Neurosurg, Memphis, TN USA
[3] Semmes Murphey Neurol & Spine Inst, Dept Neurosurg, Memphis, TN USA
[4] Univ Calif San Francisco, Dept Neurol, San Francisco, CA 94143 USA
[5] Univ Calif San Francisco, Weill Inst Neurosci, Dept Neurol, San Francisco, CA 94143 USA
[6] Siemens Med Solut USA Inc, Dept Res & Dev, Malvern, PA USA
[7] SUNY Stony Brook, Dept Neurosurg, Stony Brook, NY 11794 USA
[8] SUNY SB, Dept Neurosurg, New York, NY USA
[9] Univ Calif San Francisco, Dept Radiol & Biomed Imaging, San Francisco, CA 94143 USA