endocrinology
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Cortisol Testing: Why Collection Timing Beats the Value
A cortisol result without a clock time and a collection method attached is close to uninterpretable, because the hormone changes several-fold across a day.
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Inside a Thyroid Panel: TSH, Free T4 and Free T3
TSH is not a thyroid measurement. It is the pituitary’s opinion about thyroid output, and understanding that resolves most confusing thyroid panels.
