GWAS	Genome-wide association study
CpG	Cytosine-Guanine dinucleotide
BDNF	Brain-derived neurotrophic factor
COMT	Catechol-O-Methyltransferase
mQTL	Quantitative trait loci analysis
MSP	Methylation-specific polymerase chain reaction
SNP	Single-nucleotide polymorphisms
EWAS	Epigenome-wide association study
DMPs	Differentially methylated positions
PFC	Prefrontal cortex
TSS	Transcription start site