3821
New onset of Crohn 's disease during treatment of active ankylosing spondylitis with etanercept .
 Crohn 's disease, etanercept
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:
 Crohn 's disease, etanercept