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Zebra sign specific to ALS or not

      We read with great interest the article by Sugiyama et al. [
      • Sugiyama A.
      • Sato N.
      • Kimura Y.
      • Shigemoto Y.
      • Suzuki F.
      • Morimoto E.
      • Takahashi Y.
      • Matsuda H.
      • Kuwabara S.
      Exploring the frequency and clinical background of the “zebra sign” in amyotrophic lateral sclerosis and multiple system atrophy.
      ] entitled “Exploring the frequency and clinical background of the ‘zebra sign’ in amyotrophic lateral sclerosis and multiple system atrophy” published recently in Journal of Neurological Sciences. We are grateful to authors for their contribution to the scientific community and we appreciate their efforts to investigate that ‘Zebra Sign’ is not specific to Amyotrophic Lateral Sclerosis (ALS), but may also be present in Multiple System Atrophy (MSA).

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