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At PN10 , the effects were restricted to females and to the cholinergic system : Methamidophos promoted increased choline transporter binding in the brainstem .
 Chemical: Methamidophos; Chemical: choline
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Methamidophos; Chemical: choline