Effects of Maren Pills on the Intestinal Microflora and Short-Chain Fatty Acid Profile in Drug-Induced Slow Transit Constipation Model Rats oleh Yu Zhan, Yu Zhan, Yong Wen, Yong Wen, Li-juan Du, Xiao-xiang Wang, Shi-yu Tang, Peng-fei Kong, Wei-guo Huang, Xue-gui Tang