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Voss, M.W., Weng, T,B., Burzynska, A.Z., Wong, C.N., Clark, R., Fanning, J., Awick, R., Olson, E.O., McAuley, E. & Kramer, A.F. (2016). Fitness, but not physical activity, is related to functional integrity of brain networks associated with aging. Neuroimage, 131, 113-125.