In general, {HEAD ~ the methods} involve detecting {TAIL ~ a target} nucleic acid having a target sequence of a conserved region of BK viral genomes 
involve detecting
In general , { HEAD ~ the methods } involve detecting { TAIL ~ a target } nucleic acid having a target sequence of a conserved region of BK viral genomes
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH