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Butterfield, D., Koppal, T., Howard, B., Subramaniam, R., Hall, N., Hensley, K., … Carney, J. (1998). Structural and functional changes in proteins induced by free radical-mediated oxidative stress and protective action of the antioxidants N-tert-butyl-alpha-phenylnitrone and vitamin E. Annals of the New York Academy of Sciences, 854, 448-62. https://doi.org/10.1111/j.1749-6632.1998.tb09924.x (Original work published 1998)

Butterfield, D., Howard, B., Yatin, S., Koppal, T., Drake, J., Hensley, K., … Carney, J. Elevated oxidative stress in models of normal brain aging and Alzheimer’s disease. Life Sciences, 65(18-19), 1883-92. https://doi.org/10.1016/s0024-3205(99)00442-7 (Original work published 1999)