Early childhood morbidity in three contrasting urban districts.
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AE
D002675:Child, Preschool; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data; D006760:Hospitalization; D006801:Humans; D007223:Infant; D008131:London; D009017:Morbidity; D012189:Retrospective Studies; D012959:Socioeconomic Factors; D013383:Suburban Population; D014505:Urban Population