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Preliminary results indicate that testosterone - treated LW rats that were fed the same diet , which was supplemented with corn oil up to 20 % fat , developed prostate cancer after intervals of 6 - 12 months .
 Chemical: testosterone; Disease: prostate 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: testosterone; Disease: prostate cancer