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Background
Newborn screening (NBS) has largely eliminated the physical and neurodevelopmental effects of untreated congenital hypothyroidism (CH). Many countries, including Australia, have progressively lowered NBS bloodspot thyroid‐stimulating hormone (b‐TSH) thresholds. The impact of these changes is still unclear.
Objectives
To evaluate the performance of CH NBS following the reduction of b‐TSH...