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