2445
A 63 - year - old male experienced sudden diplopia after 9 weeks of administration of pegylated interferon ( IFN ) alpha - 2b and ribavirin for chronic hepatitis C ( CHC ) .
 diplopia, pegylated interferon ( IFN ) alpha - 2b, ribavirin, chronic hepatitis C, CHC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 diplopia, pegylated interferon ( IFN ) alpha - 2b, ribavirin, chronic hepatitis C, CHC