AITDs	Autoimmune Thyroid Disorders
ATD	Antithyroid Drugs
EUGOGO	European Group on Graves’ Orbitopathy
F/B ratio	Firmicutes to Bacteroidetes ratio
GD	Graves’ Disease
GO	Graves’ Orbitopathy
HC	Healthy Control
IBD	Inflammatory Bowel Disease
MMI	Methimazole
PICO	Population, Intervention, Comparison, and Outcome
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PTU	Propylthiouracil
SCFAs	Short-Chain Fatty Acids
TRAb	Thyroid Receptor Autoantibodies