Use of medical services as demanded by the urban poor.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005006:Ethnicity; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008396:Maryland; D008483:Medical Assistance / Q000706:statistics & numerical data*; D008875:Middle Aged; D010548:Personal Health Services / Q000706:statistics & numerical data; D011203:Poverty; D012111:Residence Characteristics; D014505:Urban Population