1. Department of Gastrointestinal Medical Oncology, Harbin Medical University Cancer Hospital, No. 150, Haping Road, Nangang District, Harbin 150001, China
2. Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, No.194, Xuefu Road, Nangang District, Harbin 150000, China
3. Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Huan-Hu-Xi Road, Hexi District, Tianjin 300060, China