Antitoxins which neutralize {HEAD ~ the pathologic effects} of {TAIL ~ clostridial toxins} are provided 
of
Antitoxins which neutralize { HEAD ~ the pathologic effects } of { TAIL ~ clostridial toxins } are provided
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH