A double-blind, randomized, placebo-controlled, single-center clinical trial of jiaotaiwan for the treatment of insomnia symptoms caused by disharmony of the heart and kidney oleh Nengzhi Xia, Chengrou Jiang, Yiwei Zhou, Qun Huang, Lufeng Hu, Haihuan Zeng, Lin Luo, Zhengzhong Yuan