1. Ludwig Center for Cancer Genetics and Howard Hughes Medical Institutions, The Johns Hopkins Kimmel Cancer Center, the Department of Oncology, the Department of Pathology, the Department of Neurosurgery, the Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
2. The Preston Robert Tisch Brain Tumor Center at Duke, The Pediatric Brain Tumor Foundation Institute, the Department of Pathology, the Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
3. The Department of Pathology, the Department of Neurology, School of Medicine, University of Sao Paulo, Sao Paulo, Sao Paulo, Brazil
4. The Swim Across America Laboratory at Johns Hopkins, The Johns Hopkins Medical Institutions, Baltimore, Maryland, USA