Simple blood test can predict which breast cancer treatment will work best, study finds The GuardianCirculating Cell-Free DNA as an Integrative Biomarker in Breast Cancer: Correlation with Molecular Subtypes, Mutation Status, and Treatment Response FrontiersctDNA Positivity After Neoadjuvant T-DM1 May Predict HER2-Positive Breast Cancer Recurrence The ASCO PostJavier Pascual: ctDNA as a Key Predictor in Advanced Breast Cancer OncodailyBlood test can predict which breast cancer treatment will work best The Telegraph