1 Department of Neurosciences (F.J.), King's College Hospital, London; MRC Centre for Neuromuscular Diseases and Department of Molecular Neuroscience (F.J., H.H., M.G.H.), UCL Institute of Neurology; MRC Computational Genomics Analysis and Training Programme (K.F., D.S., A.H.), University of Oxford; Central Manchester University Hospitals (H.K.); and NIHR UCLH Biomedical Research Centre (S.M.S.), Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, UK.