Langeskov-Christensen, M, Bisson, E J, Finlayson, M L & Dalgas, U 2017, ' Potential pathophysiological pathways that can explain the positive effects of exercise on fatigue in multiple sclerosis : A scoping review ', Journal of the Neurological Sciences, vol. 373, pp. 307-320 . https://doi.org/10.1016/j.jns.2017.01.002