1. State key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases Air Force Medical University Xi'an China
2. Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education. School of Medicine Northwest University Xi'an China
3. Department of Digestive Disease and Gastrointestinal Motility Research Room The Second Affiliated Hospital of Xian Jiaotong University Xi'an China
4. Department of Gastroenterology and Hepatology Jinling Hospital, Medical School of Nanjing University Nanjing China