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Split elbow sign: more evidence for the importance of cortical dysfunction in ALS

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  • Contributors SV was commissioned to write an editorial commentary.

  • Funding Funding support from the National Health and Medical Research Council of Australia [Project grant numbers 510233, 1024915, 1055778, Program Grant #1037746] and Motor Neuron Disease Research Institute of Australia is gratefully acknowleged.

  • Competing interests None declared.

  • Patient consent for publication Not required.

  • Provenance and peer review Commissioned; internally peer reviewed.

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