21043
This demand generates the need for appropriate standardized protocols to test and compare the effectiveness of new BTX preparations . Objectives : Based on the previously described electrophysiological methods , we measured and compared the inhibitory effects of two BTX type A ( BTX - A ) preparations on neuromuscular transmission through split - body test . Methods : The effectiveness was evaluated in terms of the compound muscle action potential ( CMAP ) and conduction velocity after BTX - A injection .
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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