RIs	reference intervals
CLSI	Clinical and Laboratory Standards Institute
IFCC	International Federation of Clinical Chemistry and Laboratory Medicine
C-RIDL	Committee on Reference Intervals and Decision Limits
TSH	thyroid-stimulating hormone
fT4	free thyroxine
fT3	free triiodothyronine
TFTs	thyroid function tests
HC	hierarchical clustering
LIS	Laboratory Information System
anti-TPO	Anti-Thyroid Peroxidase Antibodies
anti-TG	Anti-Thyroglobulin Antibodies
KDE	Kernel Density Estimation
MDA	Mean Decrease Accuracy
NHANES	National Health and Nutrition Examination Survey
TE	Total Error
TEa	Allowable Total Error
RF	Random Forest