1. Neurosurgery Center for Research, Training and Education, Loma Linda University, Loma Linda, CA, USA
2. Molecular Radiation Biology Laboratories, Loma Linda University, Loma Linda, CA, USA
3. Departments of Pathology and Laboratory Medicine (Neuropathology) and Neurology, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, CA, USA
4. Department of Chemistry and the Howard Hughes Medical Institute, University of California Berkeley, Berkeley, CA, USA