Childhood morbidity in relation to number of children in unitary and joint families.
D002648:Child; D003677:Deficiency Diseases / Q000453:epidemiology*; D005191:Family Characteristics; D006801:Humans; D010608:Pharyngeal Diseases / Q000453:epidemiology*; D012874:Skin Diseases, Infectious / Q000453:epidemiology*