Re: “Twenty five year follow-up for breast cancer incidence and mortality of the Canadian National Breast Screening Study: randomised screening trial”

This 2014 commentary by Noel S. Weiss addresses the findings of the Canadian National Breast Screening Study (CNBSS), which reported no significant reduction in breast cancer mortality with annual mammography screening in women aged 40–59 over a 25-year follow-up period. Weiss discusses methodological concerns, including potential biases in randomization and