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The risk of myocardial infarction was similar among women who used oral contraceptives whether or not they had a prothrombotic mutation .
 myocardial infarction, oral contraceptives
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 myocardial infarction, oral contraceptives