1. Department of Clinical Neurophysiology, Sleep Unit, University Hospital “La Princesa”, Madrid, Spain
2. Department of Neurology, Sleep unit, University Hospital “HM Puerta del Sur”, Móstoles, Spain
3. Department of Neurology, Sleep Unit, University Hospital “HM Sanchinarro”, Madrid, Spain
4. Clinical Neurophysiology. University Hospital “Fundación Jiménez Díaz”, Madrid, Spain
5. Department of Neurology, Movement disorders unit, University Hospital “La Princesa”, Madrid, Spain