Instructions for Collection and Transport

Fasting preferred
If specimen is submitted frozen, please provide hematocrit result. A hematocrit collected within
24 hours of the RBCF collection is acceptable if the patient has not received a transfusion or
experienced excessive bleeding in that 24 hour period.
Please note: Methotrexate and leucovorin may interfere with assay.

Collect 3.0 mL whole blood and send in the original collection tube. Mix well. Transport refrigerated on ice packs.