Following this, {TAIL ~ the sample} is tested for the presence or {HEAD ~ absence} of at least one specific nucleic acid sequence using nucleic acid hybridization methods and a labeled nucleic acid probe 
Following this , { TAIL ~ the sample } is tested for the presence or { HEAD ~ absence } of at least one specific nucleic acid sequence using nucleic acid hybridization methods and a labeled nucleic acid probe
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH