1. Department of Neurology, Hospital Clínico San Carlos and Universidad Complutense, Madrid, Spain.
2. Laboratory of Aesthesiology, Madrid, Spain.
3. Department of Neurology, Madrid, Spain.
4. Department of Physical Therapy, Hospital Universitario Fundación Alcorcón and Universidad Rey Juan Carlos, Alcorcón, Madrid, Spain.
5. Centre for Sensory-Motor Interaction (SMI), Department of Health Science and Technology, Aalborg University, Aalborg, Denmark.
6. Department of Nuclear Medicine, Hospital Ramón y Cajal, Madrid, Spain.