The history of cryopreservation of biological material, however, has shown that {TAIL ~ 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 {HEAD ~ a tissue} 
The history of cryopreservation of biological material , however , has shown that { TAIL ~ 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 { HEAD ~ a tissue }
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