1. Neuroscience Unit, Conci·Carpinella Institute, Córdoba, Argentina
2. Neurology Division, Clinical Hospital, University of Buenos Aires, Buenos Aires, Argentina
3. Neurology Department, German Hospital, Buenos Aires, Argentina
4. Sección Cefaleas, Servicio de Dolor, Departamento de Neurología, Fleni, Buenos Aires, Argentina
5. CEMIC and Hospital Austral Division of Family Medicine, Buenos Aires, Argentina