1. Department of Gastroenterology; The First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
2. Department of Dermotology; The First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
3. Department of General Surgery; The First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
4. Information Center; The First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
5. State Key Laboratory of Cancer Biology and Department of Biochemistry and Molecular Biology; Fourth Military Medical University; Xi'an China
6. State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases; Xijing Hospital; Fourth Military Medical University; Xi'an China
7. Department of Pathology; Fourth Military Medical University; Xi'an China