Hopital Raymond Poincare, Garches, France
National Institute Mongi Ben Hmida of Neurology, Tunis, Tunisia
Hedi Chaker Hospital Child Neurology Department, Sfax, Tunisia
Child Health Research Institute, Gainsville, Florida, United States
Hopital Trousseau, Paris, France
Ospedale Maggiore Policlinico, Milano, Italy
Institute of Myology Pitié-Salpêtrière Hospital 47 Bd de l'Hôpital, Paris, France
Royal Victoria Infirmary Queen Victoria Road Level 6 Leazes Wing, Newcastle Upon Tyne, United Kingdom
Rigshospitalet, University of Copenhagen Blegdamsvej 9, Copenhagen, Denmark