{TAIL ~ A test kit} for preparing a chemical test pad used in testing for the presence of {HEAD ~ occult blood} in a specimen 
{ TAIL ~ A test kit } for preparing a chemical test pad used in testing for the presence of { HEAD ~ occult blood } in a specimen
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH