| GEP-NEN | Gastroenteropancreatic neuroendocrine neoplasm |
| NEC | Neuroendocrine carcinoma |
| PD-1 | Programmed death-1 |
| PDGFR | Platelet-derived growth factor receptor |
| PD-L1 | Programmed death ligand-1 |
| pNEN | Neuroendocrine neoplasm of the pancreas |
| si-NEN | Neuroendocrine neoplasm of the small intestine |
| VEGF | Vascular endothelial growth factor |
| VEGFR | Vascular endothelial growth factor receptor |
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