Liver glycogen phosphorylase is upregulated in glioblastoma and provides a metabolic vulnerability to high dose radiation by Zois, CE, Hendriks, AM, Haider, S, Pires, E, Bridges, E, Kalamida, D, Voukantsis, D, Lagerholm, BC, Fehrmann, RSN, den Dunnen, WFA, Tarasov, AI, Baba, O, Morris, J, Buffa, FM, McCullagh, JSO, Jalving, M, Harris, AL