1 Department of Neurosurgery, Stanford University School of Medicine, Palo Alto, California, USA.
2 Division of Neuropathology, Department of Pathology, Stanford University School of Medicine, Palo Alto, California, USA.
3 The Australian National University Bioinformatics Consultancy, John Curtin School of Medical Research, The Australian National University, ACT 2600, Australia.
4 Department of Neurosurgery, Duke University School of Medicine, Durham, NC 27710, USA.
5 Department of Radiology, Stanford University School of Medicine, Palo Alto, California, USA.
6 Division of Pediatric Neurosurgery, Lucile Packard Children's Hospital, Palo Alto, California, USA.