Glutathione and Xanthine Metabolic Changes in Tamoxifen Resistant Breast Cancer Cell Lines are Mediated by Down Regulation of GSS and XDH and Correlated to Poor Prognosis Glutathione Depletion and Stalwart Anticancer Activity of Metallotherapeutics Inducing Programmed Cell Death: Opening a New Window for Cancer Therapy ACS Omega Reducing Breast Cancer Risks: A Summary of Research on Vitamin D, Other Nutrients & Lifestyle Habits GrassrootsHealth Oncology Letters Association between Polymorphisms in Glutathione Peroxidase and Selenoprotein P Genes, Glutathione Peroxidase Activity, HRT Use and Breast Cancer Risk PLOS One