1 Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6500 HB Nijmegen, Netherlands. Electronic address: nicol.voermans@radboudumc.nl.
2 Basic and Translational Myology Laboratory, Université Paris Cité, BFA, CNRS UMR8251, Paris, France; Reference Centre for Neuromuscular Disorders, Institut of Myology, Neuromyology Department, Pitié-Salpêtrière Hospital, AP-HP, Paris, France.
3 Department of Human Genetics, Leiden University Medical Center, Leiden, Netherlands.
4 Department of Paediatric Neurology, Neuromuscular Service, Evelina Children Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK; Randall Centre for Cell and Molecular Biophysics, Muscle Signalling Section, Faculty of Life Sciences and Medicine, King's College London, London, UK.