title: Some epidemiological aspects of Down's syndrome in British Columbia.
mesh_terms: D001955:British Columbia; D004314:Down Syndrome / Q000453:epidemiology*; D005260:Female; D006506:Hepatitis A / Q000453:epidemiology*; D006801:Humans; D010507:Periodicity; D011247:Pregnancy; D011248:Pregnancy Complications; D012424:Rural Population; D012621:Seasons; D014505:Urban Population