21045
However , the two different BTX - A preparations did not differ significantly in effectiveness and did not induce a delay in conduction velocity . Conclusions : The new BTX - A preparation used in this electrophysiological study had similar effect compared with the previously marketed BTX - A . [ AQ : Please approve the edits made to the sentence " The new BTX - A preparation ... " ) We propose that a split - body electrophysiological protocol will be useful in establishing the comparative effectiveness of new BTX products .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None