Efficacy and safety of YinQiSanHuang-antiviral decoction in chronic hepatitis B: study protocol for a randomized, placebo-controlled, double-blinded trial по Qing-Juan Wu, Wen-Liang Lv, Juan-Mei Li, Ting-Ting Zhang, Wen-hui Zhou, Qiang Zhang, Jiu-Chong Wang, Qing-Nan Wang, Ruo-Xuan Zhang, Xin Zhao, Si-Tong Chen, Shuang Liu, Gao-Hui Li, Zheng-Min Cao, Lei Xu, Jing Chen