title: Hepatitis B virus surface antigen mutants persist in chronic carriers receiving lamivudine therapy in Singapore.
authors.forename: Wei Ning
authors.initials: WN
authors.lastname: Chen
authors.forename: Chong Jin
authors.initials: CJ
authors.lastname: Oon
authors.forename: Gek Keow
authors.initials: GK
authors.lastname: Lim
mesh_terms: D002353:Carrier State / Q000188:drug therapy* / Q000821:virology*; D006514:Hepatitis B Surface Antigens / Q000235:genetics*; D019694:Hepatitis B, Chronic / Q000188:drug therapy* / Q000276:immunology / Q000821:virology*; D006801:Humans; D019259:Lamivudine / Q000627:therapeutic use*; D009154:Mutation / Q000187:drug effects; D012846:Singapore
chemical_list: D006514:Hepatitis B Surface Antigens; D019259:Lamivudine