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Portland State University researchers who published an article three years ago in the New England Journal of Medicine about the presence of previously undiscovered forms of formaldehyde in e-cigarette vapor revisited their research and found that formaldehyde risks were even higher than they originally thought. The 2015 study by PSU chemistry professors David Peyton, Robert Strongin, James Pankow and others revealed that e-cigarette vapor can contain the new forms of formaldehyde [...]