Fulvestrant, formerly ICI 182,780, is as effective as anastrozole in postmenopausal women with advanced breast cancer progressing after prior endocrine treatment. - Howell,A.; Robertson,J.F.; Quaresma Albano,J.; Aschermannova,A.; Mauriac,L.; Kleeberg,U.R.; Vergote,I.; Erikstein,B.; Webster,A.; Morris,C. (J Clin Oncol, 2002)