Heinrich Irenaeus Quincke (26 August 1842 - 19 May 1922) was a German internist and surgeon. His main contribution to internal medicine was the introduction of the lumbar puncture for diagnostic and therapeutic purposes. After 1874, his main area of research was pulmonary medicine. Born at Frankfurt-on-the-Oder, Heinrich was the son of prominent physician Hermann Quincke and the younger brother of physicist Georg Hermann Quincke. Wikipedia
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