1. Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai 200040, P.R. China
2. Department of Digestive Diseases, Southeast Hospital, Xiamen University, Zhangzhou, Fujian 36300, P.R. China
3. Ministry of Education Key Laboratory of Contemporary Anthropology and State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, P.R. China
4. Department of General Surgery, Huadong Hospital, Fudan University, Shanghai 200040, P.R. China
5. Department of Clinical Laboratory, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 20050, P.R. China
6. Department of Laboratory Medicine, Huashan Hospital, Fudan University, Shanghai 200040, P.R. China
7. Department of Clinical Laboratory, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200240, P.R. China
8. Department of Digestive Diseases, Shanghai Pudong Hospital, Fudan University, Shanghai 201399, P.R. China