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PATIENTS AND METHODS : A total of 77 chronic hepatitis B patients who had not been treated with lamivudine were included in the study .
 Disease: chronic hepatitis B; Chemical: lamivudine
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 B; Chemical: lamivudine