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Wild - type cortical neurons , mock - electroporated ( black bars ) or with a vector expressing constitutively - active MEK1 ( white bars ) , were treated with guidance cues for 20 minutes as depicted , followed by mRNA quantification .
 Anatomy: cortical neurons
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: cortical neurons