AHRQ	Agency for Healthcare Research and Quality
AST	aspartate transaminase
ALT	alanine transaminase
CI	confidence interval
GPX1	glutathione peroxidases 1
HR	hazard ratio
IRR	incidence rate ratios
NAFLD	non-alcoholic fatty liver diseases
NOS	Newcastle Ottawa Scale
OR	odds ratio
ROS	reactive oxygen species
RR	relative risk
RCT	randomized controlled trial
SD	standard deviation
SELENOP	selenoprotein P
SMD	Standard mean differences
TXNRD	thioredoxin reductases