Prognostic utility of the 21-gene assay compared with Adjuvant! in hormone receptor (HR) positive operable breast cancer with 0 - 3 positive axillary nodes treated with adjuvant chemohormonal therapy (CHT): an analysis of intergroup trial E2197. - Goldstein,L.; Ravdin,P.; Gray,R.; Yoshizawa,C.; Childs,B.; Rowley,S.; Shak,S.; Badve,S.; Baehner,F.L.; Davidson,N.; Sledge,G.W.; Sparano,J.A. (Breast Cancer Res Trea, 2007)