No abstract available
MeSH terms
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Clinical Medicine / education
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Echocardiography / instrumentation*
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Heart Auscultation / history
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Heart Auscultation / instrumentation*
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Heart Auscultation / trends
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History, 19th Century
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Humans
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Physician-Patient Relations*
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Point-of-Care Systems
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Stethoscopes* / history
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Stethoscopes* / statistics & numerical data