1 State Key Laboratory of Genetic Engineering, Fudan Microbiome Center, School of Life Sciences, Fudan University, Shanghai, P. R. China. najiao@fudan.edu.cn.
2 Department of General Surgery, The Six Affiliated Hospital, Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Biomedical Innovation Center, Sun Yat-Sen University, Guangzhou, P. R. China. zhulx6@mail.sysu.edu.cn.
3 Department of Gastroenterology, The Shanghai Tenth People's Hospital, School of Medicine, School of Life Sciences and Technology, Tongji University, Shanghai, P. R. China. rxzhu@tongji.edu.cn.