Khan SA, Chatterton RT, Michel N, Bryk M, Lee O, Ivancic D, Heinz R, Zalles CM, Helenowski IB, Jovanovic BD, Franke AA, Bosland MC, Wang J, Hansen NM, Bethke KP, Dew A, Coomes M, Bergan RC. Soy isoflavone supplementation for breast cancer risk reduction: a randomized phase II trial. Cancer Prev Res (Phila). 2012 Feb; 5(2):309-19.