Vernie L N, De Vries M, Benckhuijsen C, De Goeij J J, Zegers C
Cancer Lett. 1983 Apr;18(3):283-9. doi: 10.1016/0304-3835(83)90237-9.
Glutathione peroxidase activity in whole blood and selenium levels in whole blood and plasma from breast cancer patients, were measured during combination chemotherapy with cyclophosphamide, methotrexate and 5-fluorouracil. No significant change in either glutathione peroxidase activity or selenium levels was observed. Comparison with matched controls showed no significant differences for either parameter.