{HEAD ~ The goal} of cryopreservation is to preserve the structural integrity and {TAIL ~ viability} of biological materials for an indefinite period of time so that these materials can be available and used as needed 
is to preserve
{ HEAD ~ The goal } of cryopreservation is to preserve the structural integrity and { TAIL ~ viability } of biological materials for an indefinite period of time so that these materials can be available and used as needed
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH