Cerebrospinal fluid findings in patients with neurological manifestations in post-COVID-19 syndrome.

"Declarations Conflicts of interestThe authors declare that they have no conflict of interest. Ethical approvalThis study was conducted according to the Declaration of Helsinki and was approved by the ethics committee of Charité – Universitätsmedizin Berlin (EA2/066/20, EA2/102/22) and the ethics committee of the University of Cologne (20–1501). Patients gave written informed consent. Consent to participateWritten informed consent was obtained from all patients in this study. Consent to publishNot applicable. Conflicts of interest The authors declare that they have no conflict of interest."

"Funding Open Access funding enabled and organized by Projekt DEAL. We acknowledge support from the German Research Foundation (DFG: FR 4479/1-1, PR 1274/8-1, WA 4101/2-1) and from the Ministry of Science, Research and Arts Baden-Württemberg (to B.W.)."