Substantia nigra hyperechogenicity does not correlate with motor features in Parkinson's disease
2016 ◽
Vol 364
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pp. 9-11
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2017 ◽
Vol 36
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pp. 76-82
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2011 ◽
Vol 118
(4)
◽
pp. 613-619
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2010 ◽
Vol 118
(4)
◽
pp. 607-612
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