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. Author manuscript; available in PMC: 2022 Apr 19.
Published in final edited form as: JAMA Neurol. 2021 Oct 1;78(10):1262–1272. doi: 10.1001/jamaneurol.2021.1312

Figure 3.

Figure 3.

Biomarkers in Differentiating Parkinson Disease (PD) From Atypical Parkinsonisms

+ Indicates the effect was shown by only 1 article or that there are inconsistent results across studies; +++, effect shown consistently in 3 or more articles or in a multisite cohort; −, no effect of biomarker was shown. MRI indicates magnetic resonance imaging; MSA, multiple system atrophy; NA, not applicable; PET, positron emission tomography; PSP, progressive supranuclear palsy; SN, substantia nigra; SPECT, single-photon emission computed tomography.