Methods
We recruited 123 women with unilateral BC, 61 of whom received BMX and 62 of whom received non‐BMX treatments, and 39 healthy controls. While participants were in the fMRI scanner, we showed them BC‐related and non‐BC‐negative images. In one condition, they were instructed to watch the images naturally. In another, they were instructed to regulate their negative emotion. We compared the fMRI signal during these conditions throughout the brain.