title: [Epidemiology and clinical study of virus hepatitis].
authors.forename: Y
authors.initials: Y
authors.lastname: Ota
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D006525:Hepatitis, Viral, Human / Q000453:epidemiology*; D006801:Humans; D007223:Infant; D008875:Middle Aged