4548
Lamivudine is effective in suppressing hepatitis B virus DNA in Chinese hepatitis B surface antigen carriers : a placebo - controlled trial .
 Chemical: Lamivudine; Disease: hepatitis B; Chemical: hepatitis B surface antigen
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:
 Chemical: Lamivudine; Disease: hepatitis B; Chemical: hepatitis B surface antigen