AA	Alopecia areata
ADSC	Adipose-derived stem cell
AKT	Protein Kinase B
ALP	Alkaline phosphatase
APC	Antigen-presenting cell (or article processing charge in a funding context)
ARRIVE	Animal Research: Reporting of In Vivo Experiments
AST	Aspartate aminotransferase
ALT	Alanine aminotransferase
BM-MSC	Bone marrow mesenchymal stem cell
BUN	Blood urea nitrogen
CASP9	Caspase 9
CD	Cluster of differentiation (e.g., CD8, CD9, CD63, CD81)
CRP	C-Reactive Protein
CTCAE	Common Terminology Criteria for Adverse Events
DPCP	Diphenylcyclopropenone
DKK1	Dickkopf-related protein 1
DP	Dermal papilla
ESR	Erythrocyte sedimentation rate
EV	Extracellular vesicle
FDA	Food and Drug Administration (U.S.)
GRADE	Grading of Recommendations Assessment, Development and Evaluation
GMP	Good manufacturing practice
HGF	Hepatocyte Growth Factor
ICTRP	International Clinical Trials Registry Platform
IFN-γ	Interferon-gamma
IGF-1	Insulin-like Growth Factor 1
IL	Interleukin (e.g., IL-10, IL-15)
ITT	Intention to treat
JAK	Janus Kinase
JAK-STAT	Janus kinase-signal transducer and activator of transcription
LEF1	Lymphoid Enhancer-binding Factor 1
MEDLINE	Medical Literature Analysis and Retrieval System Online
MISEV	Minimal Information for Studies of Extracellular Vesicles
miRNA	microRNA
mRNA	Messenger RNA
MSC	Mesenchymal stromal/stem cell
NICE	National Institute for Health and Care Excellence
NK	Natural killer (cells)
NKG2D	Natural killer group 2D
NTA	Nanoparticle tracking analysis
PCNA	Proliferating cell nuclear antigen
PI3K	Phosphoinositide 3-kinase
PICOS	Population, Intervention, Comparator, Outcomes, Study design
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PRP	Platelet-rich plasma
RCT	Randomized controlled trial
RoB	Risk of bias
ROBINS-I	Risk Of Bias In Non-randomized Studies of Interventions
SADBE	Squaric acid dibutylester
SALT	Severity of Alopecia Tool
sEV	Small extracellular vesicle
SFRP2	Secreted Frizzled-related Protein 2
SHH	Sonic hedgehog
STAT	Signal Transducer and Activator of Transcription
SYRCLE	Systematic Review Centre for Laboratory Animal Experimentation
TGF-β	Transforming Growth Factor-beta
Th	T helper (cells) (e.g., Th1, Th2, Th17)
TSG101	Tumor Susceptibility Gene 101
UC-MSC	Umbilical cord mesenchymal stem cell
VEGF	Vascular Endothelial Growth Factor
WHO	World Health Organization
Wnt	Wingless-related integration site (signaling pathway)