1 Department of Neurology, University Hospital "12 de Octubre", Av. de Córdoba km. 5,400, Madrid, Spain; Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Spain; Department of Medicine, Complutense University, Madrid, Spain. Electronic address: jbenitol67@gmail.com.
2 Department of Neurology, University Hospital "12 de Octubre", Av. de Córdoba km. 5,400, Madrid, Spain.