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