2.0 mL Serum from a Red Top Tube in a Plastic Vial
5 days Ambient
1 week Refrigerated
1 month Frozen (Preferred)
Collect 10 to 14 hours post oral dose
Do not collect in a Serum Separator Tube (SST or PST)
Centrifuge and separate from cells as soon as possible after clotting
0.5 mL
Total: 50 - 240 ng/mL
Toxic: >250 ng/mL
6 to 8 days
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