History of cardiology: the steel murmur.
Barry
Diana
D
D002309:Cardiology / Q000266:history*; D006337:Heart Murmurs; D049672:History, 19th Century; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D011665:Pulmonary Valve Insufficiency / Q000175:diagnosis / Q000266:history*