1. Department of Digestive Surgery State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers and Xijing Hospital of Digestive Diseases Fourth Military Medical University Xi'an 710032 China
2. Department of Ultrasound Diagnostics Tangdu Hospital Fourth Military Medical University Xi'an 710038 China
3. Department of Pathology Tangdu Hospital Fourth Military Medical University Xi'an 710038 China
4. State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers and Department of Biochemistry and Molecular Biology, Military Medical Innovation Center Fourth Military Medical University Xi'an 710032 China