| GBM | Glioblastoma |
| BBB | Blood-Brain Barrier |
| BBTB | Blood-Brain Tumor Barrier |
| ICI | Immune Checkpoint Inhibitor |
| IDO1 | Indoleamine 2,3 Dioxygenase 1 |
| PD1 | Programmed Death 1 |
| CTLA4 | Cytotoxic T Lymphocyte Associated protein 4 |
| PD-L1/L2 | Programmed Death Ligand 1/Ligand 2 |
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