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24 hour urine: Collect in 6 N HCL bottle obtained by calling the lab at 525-1495. Refrigerate during collection. Random urine: Freeze. 24 hour urine: Refrigerate. Record collection period (hours) on requisition. Cooler. Referral R METANEPHRINES, PLASMA. See Report SO 5 ml blood (prechilled lavender top tube) Overnight fasting preferred. ................
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