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Mechanical loading of transgenic estrogen response element ( ERE ) - luciferase reporter mice did not increase luciferase expression in cortical bone , suggesting that the loading response does not involve classical genomic ERE - mediated pathways .
 Chemical: estrogen
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: estrogen