1. Folkhälsan Institute of Genetics and Department of Medical Genetics, Haartman Institute; University of Helsinki; Helsinki Finland
2. Neuromuscular Research Center; University of Tampere and Tampere University Hospital; Tampere Finland
3. Seinäjoki Central Hospital; Department of Neurology; Seinäjoki Finland
4. Institute of Myology, National Reference Center for Neuromuscular Disorders; University Hospital of Salpêtrière; Paris France
5. Unitat Patologia Neuromuscular, Servei Neurologia; Hospital Santa Creu i Sant Pau, Universitat Autònoma; Barcelona Spain
6. Neuromuscular Unit, Neurology Department; Coimbra University Hospital; Coimbra Portugal
7. Department of Child Neurology; Kuopio University Hospital; Kuopio Finland
8. Department of Clinical Medicine, Neurology; University of Oulu and Clinical Research Center, Oulu University Hospital; Oulu Finland
9. Généthon; Evry France
10. Neurology Department; Vaasa Central Hospital; Vaasa Finland