5-FU	5-FluoroUracil
AGREE	Appraisal of Guidelines for Research and Evaluation
CEA	CarcinoEmbryonic Antigen
COLLISION	COLorectal LIver metastases: Surgery vs. thermal ablation
CI	Confidence Interval
CRC	Colorectal Liver Cancer
CRLM	Colorectal Liver Metastasis
CRS	Clinical Risk Score
DFS	Disease-Free Survival
EORTC	European Organization for Research and Treatment of Cancer
FOLFIRI	FOLinic acid, 5-Fluorouracil and IRInotecan
FOLFOX	FOLinic acid, 5-Fluorouracil and Oxaliplatin
FUFOL	5-FluoroUracil and FOLinic acid
HR	Hazard Ratio
IKNL	The Dutch Comprehensive Cancer Centre; Integraal Kankercentrum Nederland
JCOG	Japan Clinical Oncology Group
JSCCR	Japanese Society for Cancer of the Colon and Rectum
MSI	MicroSatellite Instability
MWA	Microwave Ablation
NAC	NeoAdjuvant Chemotherapy
NICE	UK National Institute for Health and Care Excellence
OS	Overall Survival
PFS	Progression-Free Survival
PICO	Patients, Interventions, Comparisons, Outcomes
PST	Potential Salvage Therapy
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
QoL	Quality of Life
RCT	Randomized Controlled Trial
RFA	RadioFrequency Ablation
rLT	Repeat Local Treatment
RR	Risk Ratio
SD	Standard Deviation