474
The authors report two cases of delayed elimination of methotrexate in patients receiving ciprofloxacin , with severe toxicity .
 delayed elimination, ciprofloxacin; delayed elimination, methotrexate; toxicity, ciprofloxacin
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:
 delayed elimination, ciprofloxacin; delayed elimination, methotrexate; toxicity, ciprofloxacin