Affiliation: | 1. Headache Unit, Department of Neurology, Hospital Clínico San Carlos, Universidad Complutense, , Madrid, Spain;2. Sleep Unit, Department of Neurophysiology, Hospital Clínico San Carlos, Universidad Complutense, , Madrid, Spain;3. Research Unit, Department of Preventive Medicine, Hospital Clínico San Carlos, Universidad Complutense, , Madrid, Spain |