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(A) The motor‐evoked potential (MEP) amplitude was significantly increased in amyotrophic lateral sclerosis (ALS) patients classified as King’s stage 3 when compared with King’s stages 1, 2, and neuromuscular controls. (B) The increase in MEP amplitude was significant in ALS patients classified as intermediate and longer disease duration. NS‐ Nonsignificant; *P < 0.05; ***P < 0.001.
