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MAOA. Scatter plots of levels of MAOA and the 25 kDa fragment (fMAOA25) in brain regions of patients with Parkinson's disease (PD), PSP and MSA. **P < 0.01, and *P < 0.05, PD, PSP, or MSA versus controls (one-way ANOVA followed by post hoc Newman-Keuls multiple comparison tests).