Effects of Spermidine on Mouse Gut Morphology, Metabolites, and Microbial Diversity oleh Dong-Mei Jiang, Ze-Long Wang, Jia-Di Yang, Xin Wang, Chun-Yang Niu, Cheng-Weng Ji, Wei-Kang Ling, Xiao-Guang An, Yong-Ni Guo, Qian Sun, Lin Bai, De-Bing Li, Xiao-Hui Si, Bo Kang