AEs	Adverse events
AF	Annulus fibrosus
aRR	Adjusted Risk Ratio
BP	Biological Process
CC	Cellular Component
CEP	Cartilaginous endplate
CI	Confidence Interval
DMEM	Dulbecco’s Modified Eagle Medium
DPBS	Dulbecco’s phosphate-buffered saline
ECM	Extracellular matrix
EVs	Extracellular vesicles
GO	Gene Ontology
hPL	Human platelet lysate
MF	Molecular Function
MMPs	Matrix metalloproteinases
MSCs	Mesenchymal stem cells
NP	Nucleus pulposus
NTA	Nanoparticle tracking analysis
ODI	Oswestry Disability Index
Q1	First Quartile
Q3	Third Quartile
RNA	Ribonucleic acid
ROS	Reactive oxygen species
RR	Risk Ratio
SAE	Serious Adverse Event
SEC	Size exclusion chromatography
STROBE	Strengthening the Reporting of Observational Studies in Epidemiology
TFF	Tangential flow filtration
VAS	Visual Analog Scale
WJ-MSCs	Wharton’s jelly-derived mesenchymal stem cells