17862
Significant differences in ESR expression were also observed in the mediobasal hypothalamus and amygdala of the na i ve control group compared with the vehicle group , highlighting the potential for gavage to influence gene expression in the developing brain .
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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