Bias in HD-ISS staging introduced by the FreeSurfer cross-sectional stream: Insights from the Huntington's Disease Young Adult Study (HD-YAS)

HK is supported by the National Institute of Health Research Academic Clinical Fellowship. HD-YAS is funded by the Wellcome Trust (grant codes 200181/Z/15/Z and 223082/Z/21/Z-SJT is PI and RIS and NZH receive funding from this grant). We also thank the Wellcome Trust Centre for Human Neuroimaging (London, UK) who acquired the MRI scans. Part of this work and funding for SJT was supported by the UK Dementia Research Institute (DRI London UK) which receives its funding from DRI Ltd, funded by the UK Medical Research Council. Some of this work was undertaken at the University College London Hospital/University College London (London UK) supported by the UK's Department of Health National Institute of Health Biomedical Research Centre (London UK).