Researchers find issues with decades of mammogram studies

LOS ANGELES (NEWSCHANNEL 3) - There's been a lot of debate in recent years on mammograms.

Now, in one of the largest reviews to date, researchers at Harvard Medical School and Brigham and Women's Hospital looked at decades of studies and found the benefits are often overestimated and the harms underestimated.

Danielle Nottingham reports.
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