Disease-free survival as a surrogate for overall survival in HR+/HER2- early breast cancer: A correlation analysis. - Untch M; Pérol D; Mayer EL; Cortes J; Nusch A; Cameron D; Barrios C; Delea T; Danyliv A; Mishra N; Gupta R; Pathak P; et al. (European journal of cancer (Oxford, England : 1990), 2024)