1. Institute I‐motion Armand Trousseau Hospital Paris France
2. Department of Neurology Warsaw Medical University Warsaw Poland
3. Neuromuscular Reference Centre Citadelle Hospital Liege Belgium
4. Neuromuscular Centre UCL Great Ormond Street Institute of Child Health London UK
5. Department of Paediatric Neurology and Neuromuscular Centre Hôpital Universitaire des Enfants Reine Fabiola (HUDERF) ULB BrusselsBelgium
6. Department of Paediatric Neurology Neuromuscular Reference Centre UZ Gent Ghent Belgium