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*”Heparin, which does not contain dextrose to preserve cell metabolism, is rarely used as an anti-coagulant for blood collection, as it can only be useful for blood that is to be transfused within 12 hours of collection because it is broken down over longer periods of time” (A.V. Hoffbrand, Daniel Catvosky, Edward G.D. Tuddenham, Postgraduate Hematology, Edition 5, 2005)
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