Re-evaluating adjuvant breast cancer trials: assessing hormone receptor status by immunohistochemical versus extraction assays.

Regan, Mm; Viale, G; Mastropasqua, Mg; Maiorano, E; Golouh, R; Carbone, A; Brown, B; Suurküla, M; Langman, G; Mazzucchelli, L; Braye, S; Grigolato, Pier Giovanni; Gelber, Rd; . ., .; Grigolati, P; Castiglione Gertsch, M; Price, Kn; Coates, As; Goldhirsch, A; Gusterson, B; International Breast Cancer Study, Group