Cohen-Adad J, Zhao W, Keil B, Ratai EM, Triantafyllou C, Lawson R, Dheel C, Wald LL, Rosen BR, Cudkowicz M, Atassi N. 7-T MRI of the spinal cord can detect lateral corticospinal tract abnormality in amyotrophic lateral sclerosis. Muscle Nerve. 2013 May; 47(5):760-2.