| CTLA-4 | cytotoxic T-lymphocyte–associated antigen 4 |
| PD-1 | programmed death 1 |
| PD-L1 | programmed cell death-ligand 1 |
| IDO | indoleamine 2,3-dioxygenase |
| NK | natural killer |
| irAEs | immune-related adverse events |
| A | adenine |
| U | uracil |
| G | guanine |
| C | cytosine |
| dU | deoxyuridine |
| PBMCs | peripheral blood mononuclear cells |
| LDH | lactate dehydrogenase |
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