13261
The results of polymerase chain reaction for aromatase from a coding sequence and specific promoter sequences ( exon I . a , exon I . c ) in JEG - 3 cells as well as the results of reporter gene assays showed that EGb dose - dependently decreased the aromatase gene expression .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None