Description
A T4 test measures the level of T4 in your blood. Too much or too little T4 can be a sign of thyroid disease. A Free test measure the amount of T4 floating in the blood stream.
A T4 test measures the level of T4 in your blood. Too much or too little T4 can be a sign of thyroid disease. A Free test measure the amount of T4 floating in the blood stream.
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