1. Department of Neurosurgery, University of California, Los Angeles, Los Angeles, CA, USA.
2. Department of Pathology & Laboratory Medicine, University of California, Los Angeles, Los Angeles, CA, USA.
3. Department of Radiology, Division of Neuroradiology, Cooper University Hospital, Camden, NJ, USA.
4. Department of Neurosurgery, Yeungnam University College of Medicine, Daegu, Korea.
5. Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA, USA.