1. Folkhälsan Research Center, Medicum, University of Helsinki, Helsinki, Finland
2. Dipartimento di Biochimica, Biofisica e Patologia Generale, Università degli Studi della Campania “Luigi Vanvitelli,” Napoli, Italy
3. Telethon Institute of Genetics and Medicine, Pozzuoli, Italy
4. Neuromuscular Diseases and Neuroimmunology Unit, Institute for Research and Health Care Foundation Neurological Institute C. Besta, Milan, Italy
5. Istituto di Neurologia, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario “A. Gemelli,” Rome, Italy
6. Dipartimento di Neuroscienze e Scienze Riproduttive ed Odontostomatologiche, Università degli Studi di Napoli “Federico II,” Napoli, Italy
7. Neuromuscular Center, Dipartimento di Neuroscienze, Università di Padova, Padova, Italy
8. Centro Dino Ferrari, Dipartimento di Fisiopatologia Medico-Chirurgica e dei Trapianti, Università degli Studi di Milano, Fondazione Institute for Research and Health Care Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
9. Center for Medical Genetics, Ghent University Hospital, Ghent, Belgium
10. Neuromuscular Unit, Department of Neurosciences, Rita Levi Montalcini, University of Torino, Torino, Italy
11. Pediatric Neurology and Neuromuscular Disorders Unit, Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal, and Child Health; University of Genoa, Istituto G. Gaslini, Genova, Italy
12. Clinica Moncucco, Lugano, Switzerland
13. Dipartimento di Medicina Sperimentale, Cardiomiologia e Genetica Medica, Università degli Studi della Campania “Luigi Vanvitelli,” Napoli, Italy
14. Center of Myology and Neurodegenerative Disease, Istituto Giannina Gaslini, Genova, Italy
15. Medicina Molecolare, Institute for Research and Health Care Fondazione Stella Maris, Pisa, Italy
16. Department of Pediatric Neurology, Catholic University and Nemo Roma Center for Neuromuscular Disorders, Rome, Italy
17. Fondazione Hospital S.Camillo Institute for Research and Health Care, Venezia, Italy
18. Department of Neurology, Ghent University Hospital, Ghent, Belgium
19. Neuromuscular and Rare Disease Unit, Dipartimento di Neuroscienze, Università degli Studi di Milano, Fondazione Institute for Research and Health Care Ca' Granda, Ospedale Maggiore Policlinico, Milano, Italy
20. Neuromuscular Research Center, University of Tampere and Tampere University Hospital, Tampere, Finland