Markedly elevated erbB {TAIL ~ 3 mRNA levels} were demonstrated in {HEAD ~ certain human mammary tumor cell lines} 
Markedly elevated erbB { TAIL ~ 3 mRNA levels } were demonstrated in { HEAD ~ certain human mammary tumor cell lines }
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD