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. 2023 Apr 15;9:62. doi: 10.1038/s41531-023-00503-2

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© The Author(s) 2023

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Fig. 3 — Distribution of a NM nVol; and b iron nVol in the SNc according to PD subtypes, anatomical quadrants, and slices, from caudal (Q1) to dorsal (Q4).