13687
We report a case of vitiligo that occurred during the second month of interferon alpha 2a therapy for chronic active hepatitis C .
 adverse effect: vitiligo, interferon alpha 2a
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
 Entity Pairs:  vitiligo, interferon alpha 2a 
Answer:
 adverse effect: vitiligo, interferon alpha 2a