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The PT‑C test cards may be used with citrated whole blood or plasma collected and processed according to the CLSI Guideline HO3‑A610 and H21‑A5.3 Test whole blood specimens within 30 minutes of collection.10 Add whole blood to 109 mM (3.2%) of the dihydrate form of sodium citrate, in a proportion of nine parts whole blood to one part ... ................
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