1. Gastrointestinal SurgeryThe Second Hospital of Jilin University Changchun 130041 China
2. College of Clinical MedicineJilin University Changchun 130012 China
3. Gastrointestinal SurgeryThe Second Affiliated Hospital of Shandong University Jinan 250033 China
4. Institute of Liver Diseases, Affiliated Hospital of Jining Medical University Jining 272067 P. R. China
5. Central LaboratoryThe Second Hospital of Jilin University Changchun 130041 China
6. Key Laboratory of Zoonosis ResearchMinistry of Education, Jilin University Changchun 130062 China