Michael W McDermott1, Kenji Ohata2, Vladimir Benes3. 1. 1Departments of Neurosurgery, Radiation Oncology, and Otolaryngology, University of California, San Francisco, California. 2. 2Department of Neurosurgery, Osaka City University Hospital, Osaka, Japan; and. 3. 3Department of Neurosurgery and Neurooncology, Military University Hospital and First Medical Faculty, Charles University, Prague, Czech Republic.