11063
The mild immunosuppression that occurs with methotrexate therapy probably places patients with rheumatoid arthritis at added risk of developing lymphoproliferative diseases , but coincidence can not be excluded .
 lymphoproliferative diseases, methotrexate
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:
 lymphoproliferative diseases, methotrexate