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This is the front side (obverse) of a Nobel Prize medal in Physiology or Medicine awarded in 1950 to researchers at the Mayo Clinic in Rochester, Minnesota (Credit: Jonathunder [photographer]/Erik Lindberg [sculptor & engraver, 1902] via en.wikipedia.org)

This is the front side (obverse) of a Nobel Prize medal in Physiology or Medicine awarded in 1950 to researchers at the Mayo Clinic in Rochester, Minnesota (Credit: Jonathunder [photographer]/Erik Lindberg [sculptor & engraver, 1902] via en.wikipedia.org)