1. Neurology Department, Hospital General Universitario Gregorio Marañón Madrid Spain
2. Internal Medicine Department, Hospital General Universitario Gregorio Marañón Madrid Spain
3. Clinical Neurophysiology Department, Hospital General Universitario Gregorio Marañón Madrid Spain
4. Neurology Department, ALS‐Neuromuscular Diseases Unit, Hospital General Universitario Gregorio, Marañón Madrid Spain
5. Instituto de Investigación Sanitaria Gregorio Marañón (liSGM) Madrid Spain