AO	Adverse outcome
AOP	Adverse outcome pathway
As	Arsenic
BKMR	Bayesian kernel machine regression
Cd	Cadmium
CI	Confidence interval
Cr(VI)	Hexavalent chromium
DIO1-3	Iodothyronine deiodinases 1-3
E1-E3	Experimental modifier-evidence categories
fT3	Free triiodothyronine
fT4	Free thyroxine
GPX	Glutathione peroxidase
H1-H4	Human modifier-evidence categories
HBM	Human biomonitoring
Hg	Mercury
HPT axis	Hypothalamic–pituitary–thyroid axis
KE	Key event
KER	Key-event relationship
MeHg	Methylmercury
MIE	Molecular initiating event
NIS	Sodium iodide symporter
Pb	Lead
Se	Selenium
SPINA-GD	Calculated peripheral deiodinase activity
SPINA-GT	Calculated thyroid secretory capacity
Sr	Strontium
T3	Triiodothyronine
T4	Thyroxine
Tg	Thyroglobulin
TH	Thyroid hormone
THSD	Thyroid hormone system disruption
TPO	Thyroid peroxidase
TSH	Thyroid-stimulating hormone
UIC	Urinary iodine concentration