874
METHODS : Eighty - eight patients with chronic hepatitis C who received interferon - alpha - 2b at a dose of 6 MU administered intramuscularly for 24 weeks in combination with ribavirin administered orally at a dose of 600 mg or 800 mg participated in the study .
 Disease: chronic hepatitis C; Chemical: interferon - alpha - 2b; Chemical: ribavirin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: chronic hepatitis C; Chemical: interferon - alpha - 2b; Chemical: ribavirin