1 Neuromuscular Diseases Unit, Hospital Universitario y Politécnico La Fe, IIS La Fe, Valencia, Spain.
2 Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain.
3 Medicine Department, Universitat de València, Valencia, Spain.
4 Children Rehabilitation Unit, Hospital Universitario La Paz, Madrid, Spain.
5 Spanish Society of Children Rehabilitation, Madrid, Spain.
6 Neuropediatrics, Hospital Viamed Santa Ángela de Cruz, Sevilla, Spain.
7 Children Neuromuscular Diseases Unit, Pediatrics, Hospital Universitario Vall d'Hebron, Barcelona, Spain.
8 Neuromuscular Diseases Unit, Institut de Recerca Sant Joan de Déu, Hospital Sant Joan de Déu, Barcelona, Spain.
9 Neuropediatrics, Hospital Universitario La Paz, IDIPAZ, Madrid, Spain.
10 Motor Neuron Functional Unit, Instituto de Investigación Biomédica de Bellvitge (IDIBELL), Hospital Universitario de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain.