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The publication sheds light on a lengthy study conducted in the US over 34 years, involving more than 74,500 nurses and 39,500 doctors. None of them had a history of cancer, heart disease or diabetes at the time they started.
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Participants provided information about their health and habits every two years, and completed a detailed dietary questionnaire every 4 years. More than 48,000 people died during the study, of which 13,500 died of cancer and another 11,400 died of cardiovascular disease.
