ACR	American College of Rheumatology
ASIC	Acid-sensing ion channels
ATP	Adenosine triphosphate
BOLD	Blood-oxygen-level-dependent
CC BY	Creative Commons Attribution
CPM	Conditioned pain modulation
DNIC	Diffuse noxious inhibitory controls
DRG	Dorsal root ganglia
DRt/SRD	Dorsal reticular nucleus/Subnucleus reticularis dorsalis
fMRI	Functional magnetic resonance imaging
GABA	γ-Aminobutyric acid
HPA	Hypothalamic–pituitary–adrenal
HRV	Heart-rate variability
ICVS	Life and Health Sciences Research Institute
IENFD	Intraepidermal nerve fiber density
IgG	Immunoglobulin G
IL-6	Interleukin-6
IL-8	Interleukin-8
LC	Locus coeruleus
LTP	Long-term potentiation
MBSR	Mindfulness-based stress reduction
mGluR(s)	Metabotropic glutamate receptor(s)
NK1	Neurokinin-1
NMDA	N-methyl-D-aspartate
P2X	Purinergic P2X receptors
PAG	Periaqueductal gray
PET	Positron emission tomography
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
QST	Quantitative sensory testing
RVM	Rostral ventromedial medulla
SFP	Small-fiber pathology
SFN	Small-fiber neuropathy
SGC	Satellite glial cells
TNF	Tumor necrosis factor
TRPV1	Transient receptor potential vanilloid 1
TSPO	18-kDa translocator protein