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Prolonged neuropsychiatric symptoms may delay the diagnosis of parkinsonism secondary to neurosyphilis
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Handling editor Anna Maria Geretti
KG and CJ contributed equally.
Contributors KG and CJ collected the data and drafted the manuscript. ZH revised the manuscript. ZD conceptualised and revised the manuscript.
Funding This work was supported by the Key R&D Projects of Science and Technology, Department of Sichuan Province (grant no. 2019YFS0217).
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.