1. Neuromuscular Unit, Neurology Department, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
2. Genetics Department, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
3. Neuropathology Department, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
4. Spanish Network for Biomedical Research in Rare Diseases (CIBERER), 28041 Madrid, Spain
5. Mitochondrial and Neuromuscular Diseases Research Group, 12 de Octubre, Hospital Research Institute (imas12), 28041 Madrid, Spain