Identifying clinically relevant prognostic subgroups of postmenopausal women with node-positive hormone receptor-positive early-stage breast cancer treated with endocrine therapy: a combined analysis of ABCSG-8 and ATAC using the PAM50 risk of recurrence score and intrinsic subtype.

Gnant, M, Sestak, I, Filipits, M, Dowsett, M, Balic, M, Lopez-Knowles, E, Greil, R, Dubsky, P, Stoeger, H, Rudas, M, Jakesz, R, Ferree, S, Cowens, JW, Nielsen, T, Schaper, C, Fesl, C, Cuzick, J.