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In conclusion , metformin attenuates estrogen - induced endometrial hyperplasia in ooferectomized rats to the same degree as progesterone .
 Chemical: metformin; Chemical: estrogen; Chemical: progesterone
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: metformin; Chemical: estrogen; Chemical: progesterone