title: [Epidemiological study of hepatitis B virus in children in the Aki area, Kochi-ken, Japan].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002986:Clinical Trials as Topic; D005260:Female; D006509:Hepatitis B / Q000453:epidemiology*; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D012409:Rubella / Q000453:epidemiology