Researchers at the University of Chicago in the United States, found through experiments, such as soft-shell shrimp food contains a lot higher concentration - five potassium arsenic compounds.

美国芝加哥大学的研究人员，通过实验发现，虾等软壳类食物含有大量浓度较高的-五钾砷化合物。

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In cases where the site lists current affiliation, I used that to locate laureates (a German-born professor working at the University of Chicago when he won the prize would thus be listed under the United States).

FORBES: American Leadership in Science, Measured in Nobel Prizes [Infographic]

Different studies from the University of Illinois at Chicago, Harvard, and Purdue have each concluded that the more positively one feels about the United States, the more likely one is to harbor anti-Arab feelings.

NPR: Many Arab-Americans Still Perceived As A 'Problem'

Mr. Lott is a former chief economist at the United States Sentencing Commission and the author of "More Guns, Less Crime" (University of Chicago Press, third edition, 2010).

WSJ: John Lott: The Facts About Assault Weapons and Crime