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