1 Centre for Brain Health, Dublin Neurological Institute at the Mater Misericordiae University Hospital, Dublin, Ireland; Edmond J. Safra Program in Parkinson's Disease, Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital - UHN, Division of Neurology, University of Toronto, Toronto, Ontario, Canada.
2 Centre for Brain Health, Dublin Neurological Institute at the Mater Misericordiae University Hospital, Dublin, Ireland.
3 Department of Neurology, Johns Hopkins Hospital, Baltimore, USA.
4 Department of Neurology, Cork University Hospital, Cork, Ireland.
5 Department of Neurology, Tallaght University Hospital, Dublin, Ireland.
6 Department of Neurology, Bon Secours Hospital, Cork, Ireland.
7 Centre for Brain Health, Dublin Neurological Institute at the Mater Misericordiae University Hospital, Dublin, Ireland; Department of Neurology, Tallaght University Hospital, Dublin, Ireland.
8 Department of Neurology, Beaumont Hospital, Dublin, Ireland.
9 UCL Queen Square Institute of Neurology, London, UK.
10 Centre for Brain Health, Dublin Neurological Institute at the Mater Misericordiae University Hospital, Dublin, Ireland. Electronic address: tlynch@dni.ie.