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Autoradiography results of the substantia nigra and putamen with [3H]UCB‐J between normal control (NC) and Parkinson disease (PD) subjects. **Statistically significant at p < 0.005. Error bars denote standard deviation. LLOD = lower limit of detection; WM = white matter. Units are in nanocuries/milligram. [Color figure can be viewed at http://www.annalsofneurology.org]
