Michael D Flower1, Sarah J Tabrizi2. 1. University College London (UCL) Huntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology and Dementia Research Centre at UCL, London, UK. 2. University College London (UCL) Huntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology and Dementia Research Centre at UCL, London, UK. s.tabrizi@ucl.ac.uk.