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Bor-Seng-Shu, E., Fonoff, E.T., Barbosa, E.R. et al. Substantia nigra hyperechogenicity in Parkinson’s disease. Acta Neurochir 152, 2085–2087 (2010). https://doi.org/10.1007/s00701-010-0736-0
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DOI: https://doi.org/10.1007/s00701-010-0736-0