1. Department of Gastroenterology, Key Laboratory of Gut Microbiota Translational Medicine Research, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital, Beijing 100730, China.
2. Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing 100005, China.
3. Department of Gastroenterology, Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment, Chongqing University Cancer Hospital, Chongqing 400030, China.