9849
A 25-year - old woman sought medical attention because of iliocaval manifestations of retroperitoneal fibrosis while she was taking methysergide .
 retroperitoneal fibrosis, methysergide
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:
 retroperitoneal fibrosis, methysergide