Child health maintenance.
D000293:Adolescent; D002648:Child; D002662:Child Health Services / Q000639:trends*; D002675:Child, Preschool; D006266:Health Education; D006801:Humans; D007114:Immunization; D007223:Infant; D007231:Infant, Newborn; D008403:Mass Screening / Q000639:trends; D010808:Physical Examination / Q000592:standards; D011314:Preventive Health Services / Q000639:trends; D014481:United States