title: Contrast in cancer: Ontario versus Maryland.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003153:Community Health Services; D005260:Female; D005380:Financing, Government; D006801:Humans; D007348:Insurance, Health; D008297:Male; D008396:Maryland; D008875:Middle Aged; D009369:Neoplasms / Q000453:epidemiology / Q000628:therapy*; D009864:Ontario