Randomised controlled trial: effect of metformin add-on therapy on functional cure in entecavir-treated patients with chronic hepatitis B oleh Wei Zhang, Yuan-Yuan Li, Qing-Hua Shang, Lin Qi, Mi-Mi Sun, Gang Chen, Yong An, Jing-Xin Li, Wang-Ping Jia, Zhong-An Sun, Hui-Bin Xu, Qing-Mei Gao, Li Tang, Xiao-Wen Wang, Ji-Yuan Zhang, Yi-Ming Mu, Fu-Sheng Wang