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