The health services delivery system.
D000328:Adult; D001741:Black or African American; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003191:Comprehensive Health Care; D003695:Delivery of Health Care; D004219:District of Columbia; D006801:Humans; D008875:Middle Aged; D008922:Mississippi; D014495:Universities