1. Ken and Ruth Davee Department of Neurology, The Northwestern Brain Tumor Institute, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, 303 East Superior, Chicago, IL 60611, USA.
2. International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
3. Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710, USA.
4. Preventive Medicine, Health and Biomedical Informatics, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA.
5. Metabolomics Core Facility of Robert H. Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
6. Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL 60208, USA.
7. Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60615, USA.
8. Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
9. Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60615, USA.