AGO Breast Panel Recommendations for the use of treatment-relevant biomarkers in early and advanced breast cancer-2026 Update. - Hartkopf A; Albert US; Bartsch R; Bauerfeind I; Banys-Paluchowski M; Bjelic-Radisic V; Blohmer JU; Dall P; Fallenberg EM; Fasching PA; Friedrich M; Gluz O; et al. (Breast (Edinburgh, Scotland), 2026)