 The report reviews the results of cohort studies and controlled trials on diet, nutrition, physical activity and breast cancer published from Jan 2006 till Dec 2007. The number of reports included is 100, from which 1 is a randomised controlled trial, 74 are reports based on prospective cohort designs, 4 are historical cohorts, 1 report has a case cohort design, and 21 are case-control studies nested in cohorts.
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