Eugen Werle reported in 1934 finding a substance in the pancreas of humans and various animals in such great amounts that the pancreas could be taken for its site of origin.
Eugen Werle informou en 1934 do descubrimento dunha substancia presente no páncreas humano e doutros animais en tan grandes cantidades, que se pensou que o páncreas era o seu lugar de orixe.