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Fredrick G. Banting (1891–1941) [upper left], John J.R. MacLeod (1876–1935) [upper right], Charles H. Best (1899–1978) [lower left], and James B. Collip (1892–1965) [lower right]. Banting and MacLeod received the Nobel Prize in Physiology or Medicine in 1923 for the discovery of insulin and shared the prize money with Best and Collip, respectively. Source: Wikipedia.
