Funding for this research was provided by:
Natural Sciences and Engineering Research Council of Canada (RGPIN/386633)
Parkinson's UK (H-1501)
Wellcome Trust (Wellcome Trust Investigator in Science)
Text and Data Mining valid from 2019-11-08
Received: 3 May 2019
Accepted: 20 September 2019
First Online: 8 November 2019
Change Date: 15 January 2020
Change Type: Correction
Change Details: The original article  contains an error in the y-axes of Fig. 8’s sub-figures whereby ‘CSF’ is mistakenly mentioned instead of ‘serum’.
Ethics approval and consent to participate
: Research was performed under the HBTRC’s ethical approval from the Institutional Review Board (2015P002028/MGH) and under the PDUK Brain Bank’s Wales Research Ethics Committee approval (REC08/MRE09/31 + 5). Research was also performed under the OPDC’s Research Ethics Committee approval (REC16/SC/0108).
: Not applicable.
: The authors declare that they have no competing interests.