11929
Meta - analysis estimated combined Odds Ratio ( 95 % CI ) of 0 . 25 ( 0 . 14 - 0 . 45 ) of dying among those treated with specific antivenom or 75 % ( 95 % CI : 55 - 86 % ) protection against death .
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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