title: Biology of hepatitis B virus variants.
authors.affiliation: Thomas Jefferson University, Jefferson Medical College.
authors.forename: M A
authors.initials: MA
authors.lastname: Feitelson
mesh_terms: D000818:Animals; D001483:Base Sequence; D017353:Gene Deletion; D014644:Genetic Variation; D016679:Genome, Viral; D006515:Hepatitis B virus / Q000235:genetics* / Q000472:pathogenicity / Q000502:physiology*; D006801:Humans; D008969:Molecular Sequence Data; D009154:Mutation; D014765:Viral Vaccines
chemical_list: D014765:Viral Vaccines