1. Department of Hepatopancreatobiliary Surgery, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
2. Central Laboratory, Changzhi People's Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi 046000, P.R. China
3. Department of Oncology, Changzhi People's Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi 046000, P.R. China