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Although it is difficult to solely attribute intratumoral hemorrhage to aspirin , we have to be careful when prescribing aspirin for patients who have asymptomatic meningioma .
 intratumoral hemorrhage, aspirin
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 intratumoral hemorrhage, aspirin