AC	Adjuvant Chemotherapy
AE(s)	Adverse Event(s)
BMI	Body Mass Index
BTC	Biliary Tract Cancer
BW	Body Weight
CAR	C-reactive Protein-to-Albumin Ratio
ESPEN	European Society for Clinical Nutrition and Metabolism
GLIM	Global Leadership Initiative on Malnutrition
GNRI	Geriatric Nutritional Risk Index
GRADE	Grading of Recommendations, Assessment, Development and Evaluations
HDAC	Histone deacetylase
IL-6	interleukin-6
JAK	Janus kinase
NAC	Neoadjuvant Chemotherapy
NCCN	National Comprehensive Cancer Network
NF-κB	nuclear factor-κB
OCEBM	Oxford Centre for Evidence-Based Medicine
ONS(s)	Oral Nutritional Supplement(s)
OS	Overall Survival
PC	Pancreatic Cancer
PEI	Pancreatic Exocrine Insufficiency
PERT	Pancreatic Enzyme Replacement Therapy
PNI	Prognostic Nutritional Index
POC	Postoperative Complication
RDI	Relative Dose Intensity
SCFA	short-chain fatty acid
SMI	skeletal muscle index
STAT3	signal transducer and activator of transcription 3
TNF-α	tumor necrosis factor-α