AGREE	Appraisal of Guidelines, REsearch and Evaluation tool
AMSTAR	A MeaSurement Tool to Assess systematic Reviews
ASCO	American Society of Clinical Oncology
ASTRO	American Society for Radiation Oncology
cGY	centigray
CI	confidence interval
CRT	chemoradiation therapy
DFS	disease free survival
ECRI	Emergency Care Research Institute
ESMO	European Society for Medical Oncology
HR	hazard radio
OS	overall survival
p	p value
PDAC	pancreatic ductal adenocarcinoma
PFS	progression free survival
QOL	quality of life
RCT	randomized controlled trial
RoB	risk of bias
ROBINS-I	Risk Of Bias In Non-Randomized Studies-of Interventions tool
SBRT	stereotactic body radiation therapy