As used herein, the term “control region” refers to {TAIL ~ a region} that confirms to {HEAD ~ the user} that the assay has worked as designed 
As used herein , the term “ control region ” refers to { TAIL ~ a region } that confirms to { HEAD ~ the user } that the assay has worked as designed
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH