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To assist in evaluating hemolytic anemias and identifying hemoglobin variants, diagnose thalassemias, and sickle cell anemia.
Whole blood collected in a lavender-top (EDTA) tube.
|Adult||Greater than 95%|
|Newborns and infants|
|1 d–3 wk||70%–77%|
|Adult–older adult||Less than 2%|