1. State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, Xi'an, China
2. State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, China
3. Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
4. Department of Gastrointestinal Surgery, Tianjin Union Medical Center, Tianjin, China
5. Statistics Office, Chengdu Military General Hospital, Chengdu, Sichuan Province, China
6. Department of Pathology, Fourth Military Medical University, Xi'an, China