The Premenopausal Breast Cancer Collaboration: A pooling project of studies participating in the National Cancer Institute Cohort Consortium by Nichols, HB, Schoemaker, MJ, Wright, LB, McGowan, C, Brook, MN, McClain, KM, Jones, ME, Adami, HO, Agnoli, C, Baglietto, L, Bernstein, L, Bertrand, KA, Blot, WJ, Boutron-Ruault, MC, Butler, L, Chen, Y, Doody, MM, Dossus, L, Eliassen, AH, Giles, GG, Gram, IT, Hankinson, SE, Hoffman-Bolton, J, Kaaks, R, Key, TJ, Kirsh, VA, Kitahara, CM, Koh, WP, Larsson, SC, Lund, E, Ma, H, Merritt, MA, Milne, RL, Navarro, C, Overvad, K, Ozasa, K, Palmer, JR, Peeters, PH, Riboli, E, Rohan, TE, Sadakane, A, Sund, M, Tamimi, RM, Trichopoulou, A, Vatten, L, Visvanathan, K, Weiderpass, E, Willett, WC, Wolk, A, Zeleniuch-Jacquotte, A, Zheng, W, Sandler, DP, Swerdlow, AJ