Littmann Stethoscopes: The Gold Standard in Medical Diagnostics A Complete Guide to Littmann Stethoscopes. In the early 1960s, a Harvard cardiologist named Dr David Littmann developed a stethoscope far...
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Littmann Stethoscopes: The Gold Standard in Medical Diagnostics A Complete Guide to Littmann Stethoscopes. In the early 1960s, a Harvard cardiologist named Dr David Littmann developed a stethoscope far...