Collection Notes: Allow serum to clot completely before centrifugation. Grossly hemolyzed and grossly lipemic samples cannot be used.
Clinical Utility: This assay is useful in the evaluation of growth disorders.
Serum (1 mL)
Refrigerated 4 Days
Frozen 12 Months
Plasma (1 mL) Heparinized
Refrigerated 4 Days
Frozen 12 Months
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