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