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The patients gave informed consent to the study, which has been performed in accordance with the ethical standards of Helsinki declaration.
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Briani, C., Cacciavillani, M., Nicolli, A. et al. ‘Snake eyes’ MRI sign: possible role of cobalt toxicity?. J Neurol 262, 471–472 (2015). https://doi.org/10.1007/s00415-014-7580-8
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DOI: https://doi.org/10.1007/s00415-014-7580-8