The health care system: changes and implications.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003695:Delivery of Health Care / Q000191:economics / Q000639:trends*; D006296:Health Services / Q000191:economics / Q000639:trends*; D006801:Humans; D007223:Infant; D013677:Medical Laboratory Science; D008875:Middle Aged; D012051:Reimbursement Mechanisms