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