Consortium members and their respective affiliations, organised by country, are listed in the appendix (pp 1–3). Authors’ contributions are in appendix (p 3). We declare no competing interests. The Consortium is supported by the Global Parkinson's Genetics Program (GP2; grant ID MJFF-022153). GP2 is funded by the Aligning Science Across Parkinson's (ASAP) initiative and implemented by The Michael J Fox Foundation for Parkinson's Research. For a complete list of GP2 members see https://gp2.org During the preparation of this work the author used ChatGPT4 in order to improve the language and readability. After using this tool, the authors reviewed and edited the content as needed and take full responsibility for the content of the publication.