a polymerase chain reaction ( pcr ) procedure capable of amplifying specific dna sequences by up to a millionfold was developed for detection of infection by human papillomaviruses ( hpvs ) of low ( hpv6 , hpv11 ) or high ( hpv16 , hpv18 , hpv33 ) oncogenic potential .
C0021344
human papillomaviruses
C0999806
hpv16