CBC News: Breast cancer screening guidelines based on flawed Canadian study, new paper says

A new paper calls into question a decades-old Canadian study that has informed breast cancer screening guidelines for women in their 40s around the world, which generally do not recommend a yearly mammogram.

The commentary — co-written by researchers at The Ottawa Hospital, Sunnybrook Research Institute in Toronto, the University of British Columbia, the University of Alberta and Harvard Medical School — will be published in the Journal of Medical Screening this week.

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