1. Department of Hepatopancreatobiliary Surgery, Affiliated Hospital of Beihua University, Jilin 132001, P.R. China
2. Department of Oncology, The First Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, Jilin 130021, P.R. China
3. Department of Nursing, Affiliated Hospital of Beihua University, Jilin 132001, P.R. China
4. Medical Department, Huailai County Hospital of Traditional Chinese Medicine, Zhangjiakou, Hebei 075400, P.R. China