7364
BACKGROUND : To assess the nature , incidence , and risk factors of retinopathy associated with pegylated interferon and ribavirin combination therapy in chronic hepatitis C patients .
 adverse effect: retinopathy, pegylated interferon; adverse effect: retinopathy, ribavirin
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 adverse effect: retinopathy, pegylated interferon; adverse effect: retinopathy, ribavirin