1. B cell Physiopathology Unit, Immunology Research Area, IRCCS Bambino Gesù Children's Hospital, Rome, Italy
2. Department of Pediatric Hematology and Oncology, IRCCS Bambino Gesù Children's Hospital, Rome, Italy
3. Division of Metabolism, IRCCS Bambino Gesù Children's Hospital, Rome, Italy
4. Unit for Neuromuscular and Neurodegenerative Diseases, IRCCS Bambino Gesù Children's Hospital, Rome, Italy
5. Confocal Microscopy core facility, IRCCS Bambino Gesù Children's Hospital, Rome, Italy
6. Department of Pediatric Science, University of Pavia, Pavia, Italy
7. 41 Pediatric Neurology, University Childrens Hospital, University of Duisburg-Essen, Essen, Germany
8. West of Scotland Genetics Service, Queen Elizabeth University Hospital, Glasgow G51 4TF, UK
9. Department of Paediatric Neurology, Neuromuscular Service, Evelina's Children Hospital, Guy's and St. Thomas' Hospital NHS Foundation Trust, London, UK
10. Randall Division for Cell and Molecular Biophysics, Muscle Signalling Section, King's College, London, UK
11. Department of Basic and Clinical Neuroscience, IoPPN, King's College, London, UK