A novel spontaneous hepatocellular carcinoma mouse model for studying T-cell exhaustion in the tumor microenvironment ===================================================================================================================== * Yu-Tzu Liu * Tai-Chung Tseng * Ruey-Shyang Soong * Chun-Yi Peng * Yu-Hsing Cheng * Shiu-Feng Huang * Tsung-Hsien Chuang * Jia-Horng Kao * Li-Rung Huang