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Recently , some studies have also reported association between patients with juvenile rheumatoid arthritis ( JRA ) treated with Methotrexate ( MTX ) and malignant lymphoma developing .
 malignant lymphoma, Methotrexate; malignant lymphoma, MTX
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:
 malignant lymphoma, Methotrexate; malignant lymphoma, MTX