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A comparison is made of breast cancer mortality in women included in a mammography screening program, including those who refused to attend, and women who were not included — even those who underwent voluntary mammography. About 215,000 women in five different studies showed between 4 and 24% reduction of mortality; however, this was significant in only two of the studies. No significant reduction was seen in those under 50 yr of age.
Key wordsMammography Breast cancer
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