{TAIL ~ The assay} is intended for use in evaluating {HEAD ~ the excreta} of an animal subject 
{ TAIL ~ The assay } is intended for use in evaluating { HEAD ~ the excreta } of an animal subject
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH