The physician can also inject a medicament directly into {HEAD ~ the bolus} with {TAIL ~ an injection needle}  
The physician can also inject a medicament directly into { HEAD ~ the bolus } with { TAIL ~ an injection needle }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH