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US National Cancer Institute (NCI) calls for re-analysis of Canadian mammography study

This article was originally published in Clinica

Executive Summary

The National Breast Screening Study of Canada (NBSSC) is seriously flawed because it admitted too many women with advanced disease. The National Cancer Institute used the study to justify withdrawing support for screening women aged 40-49 but now one of its biostatisticians, Dr Robert Tarone, says there were excess incurable cancers in the Canadian study, biasing it against mammography (Cancer, February 15th).





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