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[...] I was wrong. I have to admit it ... ... I was wrong. Specifically, I had argued that "there is no way to know which came first: the vaping or the heart attack." However, Dr. Brad Rodu -- a professor at the University of Louisville -- noticed that in fact, we do know which came first. Why? Because the PATH survey actually asked respondents not just whether they had ever experienced a heart attack, but when they had the heart attack. And similarly, the survey asked respondents not just whether they vaped, but when they started vaping.