Evaluating Adjuvant Radiation Therapy Survival Benefit in Early-Stage HER2-Positive Invasive Breast Cancer Following Breast-Conserving Surgery: A National Cohort Aligned with NRG-BR008 HERO Trial. - Cummock JS; Haider AJ; Kazmi M; Haque WM; Farach AM; Butler EB; Teh BS (Cancers, 2026)