Fig. 2From: Angiogenesis and immune checkpoint inhibitors as therapies for hepatocellular carcinoma: current knowledge and future research directionsImmunological classification of hepatocellular carcinoma adapted from Thorsson et al. [70]. PD-1: programmed cell death-1; PD-L1: programmed cell death-ligand 1; TAM: tumor associated macrophage; TILs: tumor-infiltrating lymphocytesBack to article page