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The risk of venous thromboembolism in women prescribed cyproterone acetate in combination with ethinyl estradiol : a nested cohort analysis and case - control study .
 venous thromboembolism, cyproterone acetate, ethinyl estradiol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 venous thromboembolism, cyproterone acetate, ethinyl estradiol