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BMI: Body mass index; CRP: C-reactive protein; CEA: carcinoembryonic; CA19-9: carbohydrate antigen 19-9; ASA: the American Society of Anesthesiologists; UICC: Union for International Cancer Control; HPD: hepatopancreaticoduodenectomy; PD: pancreaticoduodenectomy; CAR: Creactive protein to albumin ratio; GPS: Glasgow prognostic score; NLR: neutrophil-to-lymphocyte ratio; PLR: platelet-to-lymphocyte ratio; PNI: prognostic nutrient index; SD: standard deviation
