4559
In conclusion , a 4 - week course of lamivudine was safe and effective in suppression of HBV DNA in Chinese HBsAg carriers .
 Chemical: lamivudine; Chemical: HBsAg
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; Chemical: HBsAg