title: Letter: Virus antigen in valvular heart-disease.
mesh_terms: D000328:Adult; D000956:Antigens, Viral / Q000302:isolation & purification*; D001706:Biopsy; D002689:Chlamydia / Q000276:immunology; D002908:Chronic Disease; D004770:Enterovirus / Q000276:immunology; D005260:Female; D005455:Fluorescent Antibody Technique; D006349:Heart Valve Diseases / Q000209:etiology / Q000276:immunology*; D006351:Heart Valves / Q000473:pathology; D006801:Humans; D008297:Male; D008867:Microtomy; D008875:Middle Aged; D009174:Mycoplasma / Q000276:immunology; D009975:Orthomyxoviridae / Q000276:immunology
chemical_list: D000956:Antigens, Viral