Funding for this research was provided by:
Health Research Board (ICE/2012/6)
Received: 22 September 2019
Accepted: 1 September 2020
First Online: 23 November 2020
Ethics approval and consent to participate
: Ethical approval for this study was received from Beaumont Hospital Ethics (Medical Research) Committee (REC REF 12/84) and the Research Ethics Committee, Trinity College Dublin.Informed consent was obtained from all individual participants included in the study.
: Not applicable.
: MG, TG, IM and MH declare that they have no conflict of interest.OH is the Editor in Chief of the Amyotrophic Lateral Sclerosis and the Frontotemporal Degenerations journal, and is a member of the editorial board of the Journal of Neurology, Neurosurgery and Psychiatry.