Metformin sensitizes sorafenib to inhibit postoperative recurrence and metastasis of hepatocellular carcinoma in orthotopic mouse models oleh Abin You, Manqing Cao, Zhigui Guo, Bingfeng Zuo, Junrong Gao, Hongyuan Zhou, Huikai Li, Yunlong Cui, Feng Fang, Wei Zhang, Tianqiang Song, Qiang Li, Xiaolin Zhu, Haifang Yin, Huichuan Sun, Ti Zhang