title: Decline in hepatitis B cases.
authors.forename: F
authors.initials: F
authors.lastname: Taylor
mesh_terms: D006509:Hepatitis B / Q000453:epidemiology*; D006801:Humans; D012307:Risk Factors; D012495:San Francisco / Q000453:epidemiology; D015819:Substance Abuse, Intravenous / Q000453:epidemiology