{HEAD ~ The cryopreserved tissue} may be stored for {TAIL ~ indefinite periods} of time prior to use 
stored for
{ HEAD ~ The cryopreserved tissue } may be stored for { TAIL ~ indefinite periods } of time prior to use
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH