Mairead MacKenzie, patient author1*, Hilary Stobart, patient author1*, David Dodwell, oncologist2, Carolyn Taylor, professor of oncology2 1Independent Cancer Patients’ Voice (ICPV), London, UK 2Nuffield Department of Population Health, University of Oxford, Oxford, UK *Authors contributed equally Correspondence to: D Dodwell david.dodwell{at}ndph.ox.ac.uk Patients with early breast cancer often have concerns about their risk of a second cancer following treatment.