Area relationship between incidences of infectious hepatitis and of the births of children with Down's syndrome nine months later.
D001315:Australia; D004314:Down Syndrome / Q000453:epidemiology* / Q000209:etiology*; D004812:Epidemiologic Methods; D005260:Female; D006506:Hepatitis A / Q000453:epidemiology*; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000453:epidemiology*