About the Authors

Rebekka Ortiz

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Validation, Visualization, Writing – original draft, Writing – review & editing

rebekka.ortiz@helsinki.fi

Affiliation Department of Neurology, Helsinki University Hospital and Department of Clinical Neurosciences (Neurology), University of Helsinki, Helsinki, Finland

Filip Scheperjans

Roles Conceptualization, Data curation, Investigation, Methodology, Project administration, Supervision, Validation, Writing – review & editing

Affiliation Department of Neurology, Helsinki University Hospital and Department of Clinical Neurosciences (Neurology), University of Helsinki, Helsinki, Finland

Tuomas Mertsalmi

Roles Conceptualization, Formal analysis, Methodology, Validation, Writing – review & editing

Affiliation Department of Neurology, Helsinki University Hospital and Department of Clinical Neurosciences (Neurology), University of Helsinki, Helsinki, Finland

Eero Pekkonen

Roles Conceptualization, Investigation, Methodology, Project administration, Resources, Supervision, Validation, Writing – review & editing

Affiliation Department of Neurology, Helsinki University Hospital and Department of Clinical Neurosciences (Neurology), University of Helsinki, Helsinki, Finland

Competing Interests

Rebekka Ortiz has received a grant from the Finnish Parkinson Foundation. The foundation has no role regarding study design, data collection, analysis, decision to publish and preparation of the manuscript. All other authors have declared that no competing interests exist. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.