Double-blind, randomized trial comparing the efficacy and tolerability of fulvestrant versus anastrozole in postmenopausal women with advanced breast cancer progressing on prior endocrine therapy: results of a North American trial. - Osborne,C.K.; Pippen,J.; Jones,S.E.; Parker,L.M.; Ellis,M.; Come,S.; Gertler,S.Z.; May,J.T.; Burton,G.; Dimery,I.; Webster,A.; Morris,C.; et al. (J Clin Oncol, 2002)