As police continue to investigate the death of UPMC neurologist Autumn Klein, toxicology experts noted that cyanide poisoning deaths, while gruesome, are extraordinarily rare.

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Stephen Borron, an emergency medicine and toxicology professor at Texas Tech University Health Sciences Center, said cyanide "is certainly something that would be carefully kept out of reach of those who don't work with it every day. It's not something the average neurologist would find working in the neurology clinic, for instance."

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