aSAH	aneurysmal subarachnoid hemorrhage
NTIS	non-thyroidal illness syndrome
LT3S	low-triiodothyronine syndrome
fT3	free triiodothyronine
fT4	free thyroxine
TSH	thyroid-stimulating hormone
WFNS	World Federation of Neurosurgical Societies
GCS	Glasgow Coma Scale
GOS	Glasgow Outcome Scale
EBI	early brain injury
DCI	delayed cerebral ischemia
T3	triiodothyronine
T4	thyroxine
CT	computed tomography
CTA	computed tomography angiography
DSA	digital subtraction angiography
ACA	anterior cerebral artery
ACoA	anterior communicating artery
ICU	intensive care unit
LRL	lower reference limit
URL	upper reference limit