title: Hepatitis B virus genotypes in Japan--past, present, and future.
authors.forename: Kojiro
authors.initials: K
authors.lastname: Michitaka
authors.forename: Morikazu
authors.initials: M
authors.lastname: Onji
mesh_terms: D004279:DNA, Viral; D005838:Genotype; D006509:Hepatitis B / Q000235:genetics / Q000821:virology; D006515:Hepatitis B virus / Q000235:genetics*; D006801:Humans; D007564:Japan; D016036:Seroepidemiologic Studies
chemical_list: D004279:DNA, Viral