11932
Preclinical and antivenomics analysis confirmed efficacy of regionally appropriate antivenoms against E . ocellatus and related species ' venoms in Sub - Saharan Africa but not against Asian Echis carinatus venom .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None