About the Authors

Aaron V. Bradshaw

Roles Formal analysis, Investigation, Methodology, Validation, Visualization, Writing – original draft

Affiliation Department of Clinical and Movement Neurosciences, Queen Square Institute of Neurology, University College London, London, United Kingdom

Philip Campbell

Roles Methodology, Resources, Writing – review & editing

Affiliation Department of Clinical and Movement Neurosciences, Queen Square Institute of Neurology, University College London, London, United Kingdom

Anthony H. V. Schapira

Roles Funding acquisition, Resources, Writing – review & editing

Affiliation Department of Clinical and Movement Neurosciences, Queen Square Institute of Neurology, University College London, London, United Kingdom

Huw R. Morris

Roles Resources, Writing – review & editing

Affiliation Department of Clinical and Movement Neurosciences, Queen Square Institute of Neurology, University College London, London, United Kingdom

Jan-Willem Taanman

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Supervision, Visualization, Writing – review & editing

j.taanman@ucl.ac.uk

Affiliation Department of Clinical and Movement Neurosciences, Queen Square Institute of Neurology, University College London, London, United Kingdom

Competing Interests

I have read the journal’s policy and the authors of this manuscript have the following competing interests: JWT received funding from Michael J. Fox Foundation for Parkinson’s Research and the Royal Free Charity. AHVS received funding from the European Union and the Medical Research Council, and is a Consultant for Sanofi Aventis. HM is a Consultant for AlzProtect, Accorda, Bristol-Myers-Squibb, E-scape and the Wellcome Trust, and has received lecture fees from GE Healthcare, GSK, UCB Pharma, and the Wellcome Trust. This does not alter our adherence to PLOS ONE policies on sharing data and materials.