title: Medical costs confounded by disease severity.
mesh_terms: D005260:Female; D006331:Heart Diseases / Q000209:etiology / Q000503:physiopathology; D006760:Hospitalization / Q000191:economics*; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology / Q000503:physiopathology; D008297:Male; D012907:Smoking