van de Loo, Simone Reproducibility and diagnostic accuracy of substantia nigra sonography for the diagnosis of Parkinson's disease. [electronic resource] - Journal of neurology, neurosurgery, and psychiatry Oct 2010 - 1087-92 p. digital Publication Type: Evaluation Study; Journal Article ISSN: 1468-330X Standard No.: 10.1136/jnnp.2009.196352 doi Subjects--Topical Terms: AgedCross-Sectional StudiesFemaleHumansMaleMiddle AgedParkinson Disease--diagnosisPredictive Value of TestsROC CurveReproducibility of ResultsSubstantia Nigra--diagnostic imagingUltrasonography, Doppler, Transcranial--methods