Chronically ill children and their health care needs.
D002648:Child; D002662:Child Health Services / Q000706:statistics & numerical data*; D002675:Child, Preschool; D002908:Chronic Disease / Q000628:therapy*; D006233:Persons with Disabilities; D006301:Health Services Needs and Demand; D006302:Health Services Research; D006801:Humans; D007348:Insurance, Health; D014481:United States