Postmastectomy radiotherapy in pN1 breast cancer: Survival outcomes and prognostic factors from a single-institution cohort - Raksha M. Narasimhan; Aren Singh Saini; Kayla Samimi; Ifeanyichukwu Ogobuiro; Xuesen Zhao; Sunwoo Han; Cristiane Takita; Crystal S. Taswell (PLoS ONE, 2026)