[An outbreak of hepatitis B in an institution for mentally retarded children].
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000453:epidemiology*; D005260:Female; D006509:Hepatitis B / Q000453:epidemiology*; D006778:Hospitals, Psychiatric; D006801:Humans; D008607:Intellectual Disability; D007564:Japan; D008297:Male