NENs	Neuroendocrine neoplasms
NETs	Neuroendocrine tumors
NECs	Neuroendocrine carcinomas
RR	Risk Ratio
ES	Effect Size
SSTR	Satostatin Receptor
PRRT	Peptide receptor radionuclide therapy
PRISMA	Preferred Reporting Items for Systematic Evaluations and Meta-Analyses
TBR	Tumor-to-Background Ratios
SSA	Somatostatin Analogs
MR	Minor Response
CR	Complete Response
PR	Partial Response
SD	Stable Disease
DCR	Disease Control Rate
MH	Mantel-Haenszel model