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