Fig. 3. The freeze and thaw stability of plasma-free metanephrine (open square) and normetanephrine (closed square) (A), and urine total metanephrine (open circle) and normetanephrine (closed circle) (B).

Lab Med Qual Assur 2023;45:34~41 https://doi.org/10.15263/jlmqa.2023.45.1.34

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