Re-irradiation for malignant glioma: Toward patient selection and defining treatment parameters for salvage oleh Colette J. Shen, MD, PhD, Megan N. Kummerlowe, BS, Kristin J. Redmond, MD, MPH, Juan Carlos Martinez-Gutierrez, MD, Syed Muhammad Usama, MBBS, Matthias Holdhoff, MD, PhD, Stuart A. Grossman, MD, John J. Laterra, MD, PhD, Roy E. Strowd, MD, Lawrence R. Kleinberg, MD