EXPRESSION OF CONCERN: First mammography screening participation and breast cancer incidence and mortality in the subsequent 25 years: population based cohort study

After publication of this paper by Ma and colleagues ( BMJ 2025;390:e085029, doi:10.1136/bmj-2025-085029, published 24 September 2025) and its linked editorial (BMJ 2025;390:r1893, doi:10.1136/bmj.r1893),12 BMJ was alerted to concerns that messaging in key areas may not be sufficiently supported by the data presented in the work.