1. Headache Unit Neurology Department Vall d’Hebron University Hospital Barcelona
2. Headache and Neurological Pain Research Group Departament de Medicina Vall d’Hebron Research Institute Universitat Autònoma de Barcelona Barcelona
3. Headache Unit Neurology Department Hospital Clínico Universitario Lozano Blesa Zaragoza
4. Headache Unit Neurology Department Hospital Clínico Universitario de Valladolid Valladolid
5. Department of Neurology Hospital Clínico UniversitarioUniversidad Católica de Valencia Valencia
6. Headache Unit Neuroscience Department Hospital Universitario Virgen Macarena Sevilla
7. Headache Unit Neurology Department Hospital Universitario de la Princesa Madrid
8. Neurology Department Clínica Universidad de Navarra Pamplona
9. Neurology Department Clínica Universidad de Navarra Madrid Spain