GSTO2 and breast cancer: Finally, the large study by Andonova et al. on German patients [100] did not find any significant association between breast cancer risk or histopathological tumor characteristics and the two major GSTO polymorphisms—namely, GSTO1*A140D (C419A; rs4925) and GSTO2*N142D (A424G; rs156697)—or the two minor polymorphisms localized in the 5′UTR gene region of GSTO1-1 (G1242A; rs2164624) and GSTO2 (A183G; rs2297235), respectively.