1. Key Laboratory for Zoonosis Research, Department of Hepatopancreatobiliary Surgery, Institute of Zoonosis, The Second Hospital of Jilin University, Ministry of Education, College of Veterinary Medicine Jilin University, Changchun, Jilin 130062, P.R. China
2. Department of Hepatobiliary Medicine of Jilin Hepatobiliary Hospital, Changchun, Jilin 130062, P.R. China