6387
OBSERVATIONS : A 48-year - old woman presented with disfiguring facial edema 10 weeks after she began antiviral therapy with peginterferon alfa-2a and ribavirin for chronic hepatitis C infection .
 disfiguring facial edema, peginterferon alfa-2a; disfiguring facial edema, ribavirin
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:
 disfiguring facial edema, peginterferon alfa-2a; disfiguring facial edema, ribavirin