1. Danish Headache Center, Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
2. Danish Knowledge Center on Headache Disorders Rigshospitalet Glostrup Glostrup Denmark
3. Headache Unit, Neurology Department Vall d'Hebron University Hospital Barcelona Spain
4. Headache and Neurological Pain Research Group Vall d'Hebron Institute of Research (VHIR), Departament de Medicina, Universitat Autònoma de Barcelona Barcelona Spain
5. Department of Neurorehabilitation/Traumatic Brain Injury Rigshospitalet, University of Copenhagen Copenhagen Denmark