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. 2023 Feb 15;29(2):156–166. doi: 10.1007/s13365-023-01116-4

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Fig. 1 — Changes in plasma or blood DA after 24 weeks of exposure. Baseline indicates before the intervention, and follow-up indicates after the intervention (week 24). Statistically significant changes are seen in both treatment arms (Mann–Whitney U-test for paired analysis of the nonparametric distribution of values)