International Breast Cancer Study Group and BIG 1–98 Collaborative Group. Interpreting Breast International Group (BIG) 1–98: a randomized, doubleblind, phase III trial comparing letrozole and tamoxifen as adjuvant endocrine therapy for postmenopausal women with hormone receptor- positive, early breast cancer - Regan MM, Price KN, Giobbie-Hurder A, Thürlimann B, Gelber RD (Breast Cancer Res, 2011)
May 26;