5-HIAA	5-hydroxyindoleacetic acid
5-HT	5-Hydroxytryptamine
ACTH	adrenocorticotropic hormone
CORT	corticosterone
CRH	corticotropin-releasing hormone
DA	dopamine
DAT	dopamine transporter
DOPAC	3,4-dihydroxyphenylacetic acid
ELISA	enzyme-linked immunosorbent assay
FD	functional dyspepsia
FGIDs	functional gastrointestinal disorders
FLU	fluoxetine
FST	forced swimming test
GO	Gene Ontology
HC	healthy control
HPA	hypothalamic–pituitary–adrenal axis
HPLC	high-performance liquid chromatography
HVA	homovanillic acid
KEGG	Kyoto Encyclopedia of Genes and Genomes
LDB	light dark box test
MAOA	monoamine oxidase A
MAOB	monoamine oxidase B
NE	norepinephrine
NET	noradrenaline transporter
OFT	open field test
SERT	serotonin transporter
SPT	sucrose preference test
TH	tyrosine hydroxylase
TPH2	tryptophan hydroxylase 2
ZZKZ	Zhizhu Kuanzhong