1Department of Neurosurgery, Stanford University, Stanford, CA USA
2High-Throughput Bioscience Center, Department of Chemical and Systems Biology, Stanford University, Stanford, CA USA
3Department of Neuropathology, Stanford University, Stanford, CA USA
4Department of Developmental Biology, Stanford University, Stanford, CA USA
5Division of Neurosurgery, University of Toronto, Toronto, ON Canada
6Department of Pediatrics, Papé Family Pediatric Research Institute, Knight Cancer Institute, Oregon Health & Science University, Portland, OR USA
© The Author(s) 2019
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.