Regan, M. M., Price, K. N., Giobbie-Hurder, A., Thürlimann, B., & Gelber, R. D. (2011). Interpreting breast international group (BIG) 1-98: A randomized, double-blind, phase III trial comparing letrozole and tamoxifen as adjuvant endocrine therapy for postmenopausal women with hormone receptor-positive, early breast cancer. BioMed Central.

Regan, Meredith M., Karen N. Price, Anita Giobbie-Hurder, Beat Thürlimann, and Richard D. Gelber. Interpreting Breast International Group (BIG) 1-98: A Randomized, Double-blind, Phase III Trial Comparing Letrozole and Tamoxifen As Adjuvant Endocrine Therapy for Postmenopausal Women With Hormone Receptor-positive, Early Breast Cancer. BioMed Central, 2011.

Regan, Meredith M., et al. Interpreting Breast International Group (BIG) 1-98: A Randomized, Double-blind, Phase III Trial Comparing Letrozole and Tamoxifen As Adjuvant Endocrine Therapy for Postmenopausal Women With Hormone Receptor-positive, Early Breast Cancer. BioMed Central, 2011.