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| Year | Nominator | Nominee(s) | Motivation | |
| 1904 | Cadiz | Ramon y Cajàl | Important work on the structure of the central nervous system of humans and vertebrates. | Show » |
| 1920 | Izquierdo | Ayote Jeanbrau Lewisohn |
Improvements of the human blood transfusion method. | Show » |
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