This invention relates to {HEAD ~ the prevention} of {TAIL ~ the narrowing} of tubular walls of an animal after the tubular walls have been traumatized 
of
This invention relates to { HEAD ~ the prevention } of { TAIL ~ the narrowing } of tubular walls of an animal after the tubular walls have been traumatized
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH