University of Oxford - Nuffield Department of Clinical Neurosciences, University of Oxford - Nuffield Department of Clinical Neurosciences, University College London - Department of Renal Medicine, University of Amsterdam - Amsterdam Neuroscience, UCL Institute of Neurology - Centre for Neuromuscular Disease, University of Oxford - Nuffield Department of Clinical Neurosciences, UCL Institute of Neurology - Centre for Neuromuscular Disease, Universitat Autònoma de Barcelona - Neuromuscular Diseases Unit, Hospital La Timone - Referral Centre for ALS and Neuromuscular Diseases, Scientific Institute for Research, Hospitalization and Healthcare (IRCCS) - Ospedale Policlinico San Martino, Lund University - Department of Clinical Sciences, University of Leicester - Department of Cardiovascular Sciences, Royal London Hospital - Barts Neuromuscular Diseases Centre, University of Bristol - Institute of Clinical Neurosciences, Gloucestershire Royal Hospital - Department of Neurology, Trinity College - Department of Neurology, UCL Institute of Neurology - Centre for Neuromuscular Disease, UCL Institute of Neurology - Centre for Neuromuscular Disease, Amsterdam UMC - Department of Neurology and Neurophysiology, Amsterdam UMC - Department of Neurology and Neurophysiology, John Radcliffe Hospital - Department of Cellular Pathology, Royal London Hospital - Barts Renal Unit, University College London - Department of Renal Medicine and University of Oxford - Department of Clinical Neurosciences

University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, University of Warwick - Warwick Medical School, University of Warwick - Warwick Medical School, University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, Belfast Health and Social Care Trust, Belfast Health and Social Care Trust, Belfast Health and Social Care Trust, Belfast Health and Social Care Trust, Queen's University Belfast, Nottingham University Hospitals NHS Trust, University of Nottingham, University of Nottingham, University of Nottingham, Northern Lincolnshire and Goole NHS Foundation Trust, John Radcliffe Hospital - Department of Cellular Pathology, Government of the United Kingdom - Oxford University Hospitals NHS Foundation Trust, University Hospitals Birmingham NHS Foundation Trust, University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, University of Warwick - Warwick Medical School, University Hospitals Coventry and Warwickshire, University of Warwick - Warwick Medical School, University of Warwick - Warwick Medical School and University Hospitals Coventry and Warwickshire