Some "also rans' in the evolution of the modern stethoscope.
Woo
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Division of Cardiology, College of Physicians and Surgeons of Columbia University, New York, NY 10032, USA.
Danziger
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RS
D049672:History, 19th Century; D049673:History, 20th Century; D010330:Patents as Topic / Q000266:history*; D019023:Stethoscopes / Q000266:history*; D014481:United States