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Walter Willett MD, MPH

Walter Willett, MD, MPH, a Wisconsin native, is chairman of the department of nutrition at Harvard School of Public Health and a professor of medicine at Harvard Medical School. He has published more than 1,000 research articles, primarily on lifestyle risk factors for heart disease and cancer, and has written the textbook, Nutritional Epidemiology, published by Oxford University Press.

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Picture from The Search for Optimal Diets: A Progress Report video