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