Dec. 11, 2022
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Swiss-American pharmacologist (and later the first head of the U.S. National Cancer Institute) Carl Voegtlin (1879–1960). In 1908, Voegtlin and colleague William G MacCallum, both working at Johns Hopkins, demonstrated that tetany following parathyroidectomy was the result of the hypocalcemia. (Courtesy of the U.S. National Cancer Institute. Public domain.)