1. Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
2. Ludwig Center for Cancer Genetics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
3. Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
4. Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD USA
5. Department of Anesthesiology, Cleveland Clinic Hospital, Cleveland, OH USA
6. Preston Robert Tisch Brain Tumor Center, Duke University Medical Center, Durham, NC, USA
7. Department of Pathology, University of São Paulo School of Medicine, São Paulo, Brazil