1. Department of Gastroenterology, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
2. Institute for Microbial Ecology, School of Medicine, Xiamen University, Xiamen, China
3. Xiamen Key Laboratory of Intestinal Microbiome and Human Health, Zhongshan Hospital of Xiamen University, Xiamen, China
4. Department of Digestive Disease, School of Medicine, Xiamen University, Xiamen, China