{HEAD ~ An assay} essentially following the procedure set out in Cancer Research: 1662 1670, 1975 may be used to demonstrate inhibition of TPA induction of ODC by compounds of {TAIL ~ this invention} 
{ HEAD ~ An assay } essentially following the procedure set out in Cancer Research : 1662 1670 , 1975 may be used to demonstrate inhibition of TPA induction of ODC by compounds of { TAIL ~ this invention }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL