13704
We analyzed EDC serum levels and nuclear receptors ( NRs ) expression in order to have an indication of the internal dose of biologically active compounds and a measurement of indicators of their effects , as a result of the repeated uptake from environmental source .
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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:
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