"English pharmacologist" . . "Sir John Gaddum"@en . "1900-03-31Z"^^ . . . "1900Z"^^ . "Gaddum, John Henry"@en . "1965-06-30Z"^^ . . "Sir John Henry Gaddum FRS FRSE (31 March 1900 \u2013 30 June 1965) was an English pharmacologist who discovered Substance P, a neuropeptide in 1931 along with Ulf von Euler."@en . "1965Z"^^ . "John Henry Gaddum"@en .