“In addition to these irregularities, Dr. Keys and the AHA also failed to warn the public that smoking might be an important factor driving heart attacks, going so far as to downplay the connection between smoking and heart disease even though they certainly knew about it. According to a short book called The Seven Countries Study: A Scientific Adventure, by the first five-year analysis in 1963, Dr. Keys knew that smoking twenty-five or more cigarettes daily increased heart attack fatalities by 400 percent, making smoking the most powerful predictor of death by heart attack by far.17 But he did not include this link between smoking and heart attacks in his 1963 publications. Nor did he do so in the ensuing years.”