ERBB2 and breast cancer: To address this gap in knowledge, we conducted a multi-national, direct-to-patient survey involving patients with HER2+ BC aiming to determine patients' perceptions and fears of BC recurrence risk, to describe any additional interventions (including lifestyle choices and supportive interventions) that women with HER2+ BC were willing to undertake to reduce the risk of recurrence, and to assess patients’ willingness to be involved in the decision-making process.