{HEAD ~ The history} of {TAIL ~ cryopreservation} of biological material, however, has shown that the optimization of a cryopreservation protocol for a particular cell does not necessarily give good results when used with another cell type or with other cells in a tissue 
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{ HEAD ~ The history } of { TAIL ~ cryopreservation } of biological material , however , has shown that the optimization of a cryopreservation protocol for a particular cell does not necessarily give good results when used with another cell type or with other cells in a tissue
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