Ruminococcus gnavus plays a pathogenic role in diarrhea-predominant irritable bowel syndrome by increasing serotonin biosynthesis

Lixiang Zhai, Chun‐Hua Huang, Ziwan Ning, Yijing Zhang, Min Zhuang, Wei Yang, Xiaolei Wang, Jingjing Wang, Lu Zhang, Haitao Xiao, Ling Zhao, Pallavi Asthana, Yan Y. Lam, Chi Fung Willis Chow, Jian‐Dong Huang, Shuofeng Yuan, Kui Ming Chan, Chun‐Su Yuan, Johnson Yiu‐Nam Lau, Hoi Leong Xavier Wong, Zhaoxiang Bian