Some medical discoveries truly stand the test of time. The case of a dedicated Mayo Clinic chemist is a prime example. Feeling he was on the verge of a breakthrough that could help countless people, Edward Kendall spent Christmas Eve 1914 locked away in his lab. What he accomplished by Christmas morning was a gift to millions, one that is still improving lives 100 years later. [TRT 4:43]
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This is a special report produced for the Mayo Clinic 150th Anniversary Collection of Stories. To view other stories and learn about Mayo Clinic's sesquicentennial, please click here.