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Since tamoxifen is widely used in breast cancer treatment and has been proposed for the prevention of breast cancer , its endometrial iatrogenic effects must be carefully examined .
 Chemical: tamoxifen; Disease: breast cancer; Disease: breast cancer
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: tamoxifen; Disease: breast cancer; Disease: breast cancer