title: Poliovirus and echovirus antibodies in chronic valvular heart disease.
mesh_terms: D000293:Adolescent; D000328:Adult; D000914:Antibodies, Viral / Q000032:analysis*; D002908:Chronic Disease; D004459:Echovirus 9 / Q000276:immunology; D029822:Enterovirus B, Human / Q000276:immunology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000276:immunology* / Q000382:microbiology; D017955:Poliovirus / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral