1. Department of Health Sciences, University of Burgos, 09001 Burgos, Spain
2. Neurology Service, Burgos University Hospital, 09006 Burgos, Spain
3. Neurophysiology Service, Burgos University Hospital, 09006 Burgos, Spain
4. Department of Human Neurosciences, University of la Sapienza, 00188 Rome, Italy
5. Faculty of Health, School of Health Professions Peninsula Allied Health Centre, University of Plymouth, Derriford Rd., Plymouth PL6 8BH, UK