SCREENING FOR CHRONIC DISEASES IN A LOW-INCOME GROUP.
D044383:Black People; D002908:Chronic Disease; D004219:District of Columbia; D006306:Health Surveys; D006801:Humans; D011203:Poverty; D011315:Preventive Medicine; D001741:Black or African American
CHRONIC DISEASE; DISTRICT OF COLUMBIA; HEALTH SURVEYS; NEGROES; PREVENTIVE MEDICINE